Porsche 993, The Complete Buying Guide

Overview

The Porsche 993 (1994-1998) is the last air-cooled 911. That single fact has defined its market position, its desirability, and its price trajectory for the past decade. When Porsche replaced the 993 with the water-cooled 996 in 1998, the air-cooled era that began with the original 911 in 1963 ended forever. The 993 is the full stop at the end of that sentence.

But the 993 is far more than a sentimental milestone. It was the most technically advanced air-cooled 911 ever built. The completely redesigned multilink rear suspension (replacing the semi-trailing arms used on every 911 before it) transformed the car’s handling from the 964’s occasionally twitchy rear-end behaviour into something genuinely confidence-inspiring. The smoother, more integrated bodywork was a revelation after the bolt-on bumper look of the 964. The VarioRam variable intake system (from 1996) extracted more power from the flat-six than anyone thought possible without forced induction.

These are serious money. A rough 993 that might have been $60,000 ten years ago is now $130,000 or more. Clean Carrera S and 4S examples are pushing past $250,000. Turbos command $300,000-400,000 for good cars, and the GT2 and Turbo S are million-dollar collector pieces. Buying well is absolutely critical. The difference between a well-maintained 993 and a neglected one can be a six-figure engine rebuild.

Which Variant to Buy

993 Carrera (1994-1998)

Rear-wheel drive, 3.6-litre M64 flat-six, 272hp (early cars) or 285hp (1996+ with VarioRam). Available as coupe, cabriolet, and Targa. The six-speed G50 manual gearbox is the one you want; the four-speed Tiptronic automatic is slower, less engaging, and worth significantly less on the resale market.

The Carrera is the entry point to 993 ownership and it is a brilliant car in its own right. The naturally aspirated flat-six revs freely, the gearbox is precise and mechanical, and the rear-drive chassis rewards a skilled driver. The narrow-body Carrera is lighter than the wide-body variants and, to some enthusiasts, purer in character.

Best for: First-time 993 buyers, purists who value driving engagement over presence, anyone who wants the air-cooled experience without the stratospheric price of the wide-body cars.

993 Carrera 4 (1994-1998)

All-wheel drive with a viscous-coupling centre differential. Same engine as the Carrera. The AWD system is simpler and lighter than the 964 C4’s complex system, adding approximately 50 kg. The C4 offers more traction in the wet and a slightly more planted feel, but the steering is marginally less communicative than the rear-drive Carrera.

Best for: Buyers who want all-weather security or who drive regularly in wet conditions.

993 Carrera S (1997-1998)

The wide-body Carrera. This is the Turbo’s body shell, with the wider rear arches, Turbo-spec brakes, and a more aggressive stance, but with the naturally aspirated 285hp VarioRam engine. The Carrera S is rear-wheel drive only. It was produced only for the final two model years, making it relatively rare.

The S is the sweet spot of the 993 range for many buyers. You get the Turbo’s stunning visual presence and braking performance without the turbo engine’s complexity, heat management concerns, and significantly higher maintenance costs. It is the car that most 993 enthusiasts would choose if they could only have one.

Best for: Enthusiasts who want the best-looking 993 with naturally aspirated simplicity. The “if you know, you know” choice.

993 Carrera 4S (1996-1998)

The wide-body Carrera with all-wheel drive. The C4S combines the Turbo body with the AWD system and the naturally aspirated engine. Along with the Carrera S, it is one of the most desirable 993 configurations. The added traction of AWD combined with the wide-body stance makes this a supremely capable grand tourer.

Best for: Buyers who want the ultimate naturally aspirated 993 with maximum visual impact and all-weather capability.

993 Targa (1996-1998)

The 993 Targa broke from tradition. Instead of the classic removable roof panel used since 1967, Porsche fitted a large sliding glass roof panel that retracted into the rear window area. It was a clever piece of engineering, but the result divided opinion. The glass roof adds weight, raises the centre of gravity slightly, and the mechanism can develop faults over time. Targa models are less desirable than coupes and trade at a discount.

Best for: Buyers who want open-air motoring without a full cabriolet. A slightly more affordable way into 993 ownership.

993 Turbo (1995-1998)

Twin-turbocharged 3.6-litre flat-six producing 408hp at 5,750 rpm and 540 Nm of torque. All-wheel drive. The first twin-turbo 911, and one of the defining supercars of the 1990s. The 993 Turbo was devastatingly fast for its era, 0-100 km/h in 4.5 seconds, and it could embarrass Ferraris and Lamborghinis costing twice the price.

The twin-turbo setup provides surprisingly progressive boost delivery compared to the single-turbo 930 and 964 Turbo that preceded it. The all-wheel drive system manages the enormous torque with remarkable composure. The Turbo is also the most refined 993 to drive, it is quieter, smoother, and more insulated than the naturally aspirated cars.

The Turbo is, ironically, the relative bargain compared to the GT2 and Turbo S, offering similar performance at a fraction of the price. Maintenance costs are higher than the Carrera, particularly turbocharger rebuilds, intercooler servicing, and the additional complexity of the boost control system. But a well-maintained Turbo is no more troublesome than any other 993.

Best for: Buyers who want supercar performance in a 993 package. The smart choice in the forced-induction 993 hierarchy.

993 Turbo S (1998)

The 450hp farewell. Porsche built approximately 345 Turbo S models for the final year of production, with larger turbochargers, revised ECU mapping, carbon fibre interior trim, and the yellow brake calipers that would become a Porsche trademark. The Turbo S was the most powerful road-going 911 Porsche had built at the time of its release.

Best for: Collectors. These are half-a-million-dollar-plus cars and climbing. This is not a car you buy to drive on weekends.

993 GT2 (1995-1998)

The wildest road-going 993. A twin-turbocharged engine producing 430hp (450hp in later “Evo” form), rear-wheel drive only (the AWD system was deleted to save weight), stripped interior, bolt-on wheel arch extensions, and a huge rear wing. The GT2 was a race homologation special, built so Porsche could compete in GT2-class racing. Approximately 194 road cars were produced.

Best for: Collectors with very deep pockets. Current values exceed $500,000 and the best examples approach or exceed $1 million AUD. This is a museum-grade investment piece.

The Recommendation

For a first 993, the Carrera manual coupe is the smart entry point. It is the most affordable way into the last air-cooled 911, and it is a genuinely wonderful car. If budget allows, the Carrera S is the one most enthusiasts dream about: the wide-body stance, the naturally aspirated simplicity, and the knowledge that you are driving arguably the most beautiful 911 ever made.

What to Look For

Engine: The Make-or-Break Inspection

The 3.6-litre M64 flat-six is the heart of the 993, and engine problems are the most expensive issues you will encounter. A full engine rebuild costs $20,000-40,000 AUD. A pre-purchase inspection by an independent Porsche specialist is non-negotiable.

Nikasil Bore Wear (Early Cars, CRITICAL): Early 993 engines (1994-1995 production, roughly) used Nikasil-coated cylinder bores. Nikasil is a nickel-silicon carbide coating applied to the aluminium cylinder walls. It is excellent in theory but reacts badly with high-sulphur fuel, which was common in Australia and the UK during the 1990s. The sulphur attacks the Nikasil coating, causing bore scoring, loss of compression, and eventually catastrophic engine failure.

Not all early 993 engines are affected, it depends on the fuel history of the specific car. Later 993s (1996+) switched to Alusil cylinder liners, which are not susceptible to this issue.

How to check: A compression test and leak-down test are essential. Compression should be even across all six cylinders (within 5% of each other) and above 120 psi. A bore scope inspection, where a tiny camera is inserted into each cylinder through the spark plug hole, will reveal scoring on the bore walls. If the Nikasil is scored, the engine needs new cylinders at minimum. Budget $15,000-25,000+ for an engine rebuild.

Oil Leaks: The air-cooled flat-six leaks oil. This is a fact of life. Some seepage from gasket faces is acceptable on any 993. Active dripping is not. The most common leak sources are:

• Chain tensioner housings (oil weep from the camshaft chain cover area)
• Cam cover gaskets
• Oil return lines from the cylinder heads
• Rear main seal (crankshaft seal at the gearbox end, messy and expensive to fix, $2,000-4,000)

Look under the car. A light film of oil residue is normal. Drips forming on the underside panels, or oil pooling on the ground, indicate leaks that need attention.

Hydraulic Chain Tensioners: Earlier 993 engines had hydraulic chain tensioners with weaker internal springs. If the tensioners fail, the timing chain can jump, with catastrophic results. Updated tensioners with stronger springs are available. Ask if the car has had the tensioner update. If not, budget $3,000-5,000 to have it done.

Cylinder Head Cracking: The aluminium cylinder heads, particularly on the exhaust side, can develop cracks from thermal stress. This is more common on cars that have been overheated or run with inadequate cooling (blocked oil cooler, failed thermostat). A thorough inspection should include checking for coolant (from the head gasket) or exhaust gas leaks at the head-to-barrel joint.

Transmission

Manual (G50/20): The G50 six-speed manual is a robust, long-lived gearbox. Check for smooth engagement on all six gears, no crunching on downshifts (particularly second and third), and no whining or grinding noises. A worn second-gear synchro is the most common issue, it manifests as a slight crunch on fast second-gear downshifts when cold. Not critical if mild, but a gearbox rebuild ($5,000-8,000) is the proper fix.

Tiptronic: The four-speed Tiptronic automatic was available on all Carrera variants. It saps the car’s character, adds weight, and is worth 15-25% less than the equivalent manual. The Tiptronic valve body can develop faults, and a rebuild is $8,000-15,000. Unless you physically cannot operate a clutch, buy the manual.

Dual-Mass Flywheel: The 993 uses a dual-mass flywheel to dampen driveline vibrations. These fail. Listen for a rattling noise from the bellhousing area at idle that disappears when the clutch pedal is depressed. Replacement requires gearbox removal and costs $3,000-5,000 including parts and labour.

Suspension

The 993’s multilink rear suspension (LSA, Lightweight Stable Axle) was a quantum leap over the 964’s semi-trailing arm design. It transformed the 911’s rear-end handling behaviour from occasionally treacherous to reassuringly predictable.

Check for worn bushings in the rear suspension arms (there are multiple arms per side, each with bushings that wear). Symptoms include vague rear-end feel, clunking over bumps, and uneven rear tyre wear. A full rear suspension bush refresh costs $3,000-6,000.

Cars fitted with the self-levelling rear suspension (typically Turbo and some C4 models) use hydraulic accumulators that fail and are expensive to replace ($3,000-6,000).

Check the front strut mounts and control arm bushings. The front suspension is conventional MacPherson strut, and worn components manifest as vague steering and clunking over bumps.

Body

The 993 has a galvanised body and is well-protected from corrosion. Rust is not a major concern on most cars, but accident damage absolutely is. These cars have been valuable for a long time, and some have been repaired to varying standards after incidents.

• Paint depth gauge: Essential. Check every panel for consistent paint thickness. Variations indicate respray, which may indicate accident repair.
• Panel gaps: Check the gaps between the bonnet and front wings, between the doors and the body, and at the rear bumper. Uneven gaps suggest panel replacement or poor repair.
• Door shut lines: Open each door and inspect the inner sill area and door jambs for overspray, colour mismatch, or evidence of panel alignment shims.
• Stone chips: Normal on a driven car. Heavy stone chipping on the front bonnet and bumper is expected, but check that it hasn’t broken through the galvanising to cause corrosion.

Electrical and Ancillaries

• AC compressor: The Nippondenso AC compressor is a known failure item. It seizes internally, and replacement costs $2,000-4,000.
• Power window regulators: The window regulators fail, causing the windows to drop into the door or operate erratically. Replacement: $500-1,000 per side.
• Brake master cylinder: Pedal feel can become spongy or inconsistent if the master cylinder is failing. Replacement: $800-1,500.
• Central locking and alarm: The factory alarm system (particularly on cars with aftermarket modifications) can develop gremlins. Test all lock/unlock functions, boot release, and alarm arm/disarm.

Service History

Service history is everything. A 993 with a complete, stamped service book and a folder of receipts from a recognised Porsche specialist is worth 20-30% more than an identical car with gaps in its records. The service history tells you how the car has been treated, and treatment is everything on a car whose engine costs $30,000 to rebuild.

Look for oil changes every 5,000-10,000 km with quality oil (Mobil 1 or equivalent). Look for valve adjustments every 20,000-30,000 km. Look for brake fluid changes every two years. And look for the big-ticket items, chain tensioner update, dual-mass flywheel check, rear suspension bush refresh, to have been addressed at the appropriate time.

Price Guide (2026 AUD)

Carrera and Carrera 4

Condition	Carrera Manual Coupe	Carrera 4 Manual	Carrera Tiptronic	Cabriolet (any)
Needs work	$130,000-160,000	$120,000-150,000	$100,000-130,000	$110,000-140,000
Clean driver	$160,000-210,000	$150,000-200,000	$130,000-165,000	$140,000-180,000
Excellent	$210,000-280,000	$200,000-260,000	$165,000-210,000	$180,000-240,000

Carrera S and Carrera 4S (Wide Body)

Condition	Carrera S	Carrera 4S
Needs work	$180,000-220,000	$190,000-230,000
Clean driver	$220,000-280,000	$230,000-300,000
Excellent	$280,000-380,000	$300,000-400,000

Turbo, Turbo S, and GT2

Condition	Turbo	Turbo S	GT2
Needs work	$250,000-320,000	-	-
Clean driver	$320,000-400,000	$500,000+	$700,000+
Excellent	$400,000-550,000	$650,000+	$1,000,000+

Notes: Tiptronic models are 15-25% less than manual equivalents. VarioRam cars (1996+) command a small premium over pre-VarioRam cars. Matching-numbers cars are increasingly important at higher price points. Targa models trade at approximately 10-15% less than equivalent coupes.

Running Costs

Owning a 993 is not cheap, but it is predictable if the car is well-maintained. Budget carefully and you will not be surprised.

• Annual service (oil change, filter, inspection, minor adjustments): $1,200-2,500
• Major service (every 30,000 km; valve adjustment, all fluids, comprehensive inspection): $3,500-6,000
• Specialist labour rate: $160-230/hour at a reputable Porsche specialist
• Insurance: Agreed-value essential. Budget $3,000-8,000/year depending on the car’s insured value. Shannons, Grundy, or a specialist classic insurer.
• Tyres: $350-600 each (225/40R18 front, 265/35R18 rear on later cars; 205/55R16 front, 245/45R16 rear on earlier standard cars)
• Brake pads and rotors: $2,000-4,000 for a full set (pads and rotors, all four corners)
• Unexpected repairs: Budget $5,000-10,000/year. Something will always need attention on a 25+ year-old performance car.
• Engine rebuild (if needed): $20,000-40,000
• Fuel: 13-18 L/100 km depending on driving style. 98 RON premium unleaded.

Final Advice

The Porsche 993 is one of the great sports cars. The last air-cooled 911, the most refined of the breed, and a car that will reward you every single time you turn the key. But it is also a car where buying badly can cost you the price of a new car in repairs.

Get a pre-purchase inspection. Not a quick look from your local mechanic. A full, comprehensive inspection by an independent Porsche specialist who knows air-cooled 911s. This means compression and leak-down testing on all six cylinders, bore scope inspection of the cylinder bores (especially on pre-1996 cars), a complete underside examination on a hoist, and a thorough test of every electrical system. Budget $500-1,200 for this inspection. It will be the best money you spend.

Buy the best car you can afford. A cheap 993 is never cheap. The car that costs $30,000 less than the market average is $30,000 less for a reason, and that reason will cost you $50,000 to fix. Service history, condition, and provenance are worth every cent of the premium they command.

Find a Porsche specialist before you buy. Build a relationship with a workshop that knows these cars. They will advise you on potential purchases, maintain the car properly, and catch small problems before they become expensive ones. The Porsche Club Australia network is an excellent resource for finding recommended specialists in your state.

The 993 is the end of an era. Every time you start it and hear that flat-six bark behind you, you are hearing something that will never be made again. That is worth buying right.