Porsche 964, The Complete Buying Guide

Overview

The Porsche 964 is the air-cooled 911 that bridged two eras. Produced from 1989 to 1994, it retained the unmistakable 911 silhouette but was 87% new underneath. Porsche’s internal designation was Type 964, and it represented the most comprehensive update the 911 had received in its 25-year history. Coil spring suspension replaced the torsion bars that had been used since 1963. Power steering arrived. ABS was standard. There were airbags. The flat-six grew to 3.6 litres and gained electronic engine management. It was, finally, a modern car.

And yet it is still, unmistakably, an air-cooled 911. The engine sits behind the rear axle, breathing through a cooling fan rather than a radiator. The exhaust note is the distinctive flat-six bark that no water-cooled Porsche has replicated. The steering, despite the new power assistance, communicates through your palms. The 964 is the sweet spot for many enthusiasts: civilised enough to drive confidently every day, analogue enough to reward skill, and old enough to feel genuinely connected to the road.

The market has recognised this. The 964 was the affordable air-cooled 911 for years, the one you bought because you couldn’t afford a 993. That era is decisively over. Values have climbed relentlessly since 2015, and a good 964 now commands serious money. Buying well is everything, because the difference between a well-maintained car and a neglected one is a six-figure engine rebuild.

Which Variant to Buy

Carrera 2 (C2)

Rear-wheel drive, 3.6-litre M64 flat-six, 250 hp. This is the purist’s choice and the one most enthusiasts want. The C2 is the lightest 964 variant, the most communicative to drive, and the best balanced. Without the C4’s AWD hardware, it weighs approximately 75 kg less and offers a purer connection between driver, rear tyres, and road surface.

Available as coupe, Targa, and cabriolet, with either the 5-speed G50 manual or the 4-speed Tiptronic automatic. The manual coupe is the definitive configuration: the one that holds value best, drives best, and is most sought after by collectors.

The C2 is the 964 to buy. Unless you specifically need AWD or want the Turbo experience, start here.

Carrera 4 (C4)

All-wheel drive, same 3.6-litre engine, same body. The C4 was actually the first 964 variant released in 1989, with the C2 following in 1990. The AWD system distributes power 31% front, 69% rear under normal conditions and can shift up to 100% to either axle.

The C4 is more secure in the wet and more forgiving at the limit, but the AWD system adds weight and complexity. The steering feel is slightly muted compared to the C2. More importantly, the AWD system uses aluminium wiring in the control unit harness, which corrodes over time and causes expensive faults. The transfer case and centre differential are additional service items that the C2 simply does not have.

C4 values sit 10-20% below equivalent C2s, reflecting both lower demand and higher maintenance costs. If you live somewhere with genuinely poor conditions and need AWD, the C4 is competent. But for most Australian buyers, the C2 is the better car.

Turbo (930/3.3 and 964 Turbo 3.6)

The 964 Turbo came in two distinct generations. The initial cars (1991-92) used the venerable 3.3-litre single-turbo engine from the 930, producing 320 hp. It is essentially the same engine that had powered the 911 Turbo since 1978, updated with an intercooler and revised engine management. The turbo lag is pronounced, the power delivery is explosive, and the handling is genuinely challenging in the wet. This is old-school turbo motoring.

From 1993, the 964 Turbo received the new 3.6-litre turbocharged M64/50 engine producing 360 hp. Only approximately 1,437 were built across all markets. The 3.6 Turbo is a fundamentally better car: more power, better throttle response, less lag, and a more refined delivery. It is the last of the single-turbo air-cooled 911 Turbos and one of the great Porsche engines. Values reflect its rarity and desirability.

Both Turbos are rear-wheel drive with 5-speed manuals. Both have the wide body, larger brakes, and uprated suspension. These are serious cars that demand respect, particularly in the wet. Budget accordingly for maintenance, because turbo-specific components (turbocharger, wastegate, intercooler plumbing, oil scavenge system) add to the service burden.

RS and RS America

The 964 RS is the homologation special, built to qualify the Cup Car for racing. It features a 260 hp engine tune with revised camshafts and engine management, a stripped interior (no carpets, no rear seats, no sound deadening, manual windows, no air conditioning), thinner glass, stiffer suspension, and lightweight body panels. The RS weighs approximately 1,220 kg, roughly 130 kg less than a standard C2.

The RS is the most visceral 964 driving experience. It is raw, loud, direct, and utterly focused. It is also astronomically expensive and the most collectible 964 variant. These are cars that have largely moved beyond being driven regularly and into the collector/investment category.

The RS America (1993-94) was the US-market lightweight variant. It is less extreme than the European RS, retaining some sound deadening and comfort features, but it is still a purposeful, lightweight machine. RS America values are lower than European RS cars but still substantial.

Speedster

The 964 Speedster (1993-94) features a dramatically raked windscreen, a humped tonneau cover behind the seats, and a manual soft top. Production was limited (approximately 936 units), and the Speedster is a striking and unusual car. It shares the C2’s mechanicals and is available in both narrow body and wide body (Turbo Look) configurations.

The Speedster is a collector’s car rather than a driver’s car. The low windscreen creates buffeting at speed, the manual top is fiddly, and practical storage is minimal. Values are strong but driven by rarity and aesthetics rather than driving engagement.

Targa

The 964 Targa retains the traditional removable roof panel and fixed rear window of previous 911 Targas. It is the least desirable body style in terms of value (typically 10-15% below an equivalent coupe) but offers a genuine open-air 911 experience without the full commitment of a cabriolet. The Targa top can be removed and stored in the front boot in about 30 seconds, making it the most versatile 964 body style.

Targa-specific issues include seal leaks around the removable panel and the fixed rear window, and increased body flex compared to the coupe. If you want an open-air 964 on a budget, the Targa is worth considering.

What to Look For

Engine

The M64 flat-six is a magnificent engine when healthy and a catastrophic expense when it is not. A full engine rebuild costs $25,000-$45,000 AUD at a specialist.

Oil leaks: Every 964 leaks oil. Every single one. The question is how much. Acceptable is a light film of oil on the engine’s lower surfaces. Unacceptable is active dripping from the chain tensioner housings, cam cover gaskets, cylinder base gaskets, or case halves. Get the car on a hoist and inspect the engine from below. Oil on the exhaust manifolds or heat exchangers is a fire risk and must be addressed.

Chain tensioner housings: The most common and most discussed 964 oil leak. The dual-row timing chain is housed in a casting bolted to the front of the engine case, and the gaskets between this housing and the case weep oil persistently. A light weep is normal and liveable. An active drip requires engine removal and resealing: $5,000-$8,000.

Chain tensioners (early cars): Engines built before approximately 1992 had weaker hydraulic chain tensioner guides. If the tensioner guide fails, the timing chain jumps, and the engine is destroyed. Updated tensioner kits are available. Ask for evidence that the tensioners have been updated. If they have not, budget $4,000-$7,000 for the update (requires engine removal).

Dual-mass flywheel: Press the clutch in and out at idle. Listen for a rattling or chattering sound from the bellhousing area. A failed dual-mass flywheel shudders on engagement and eventually makes a pronounced rattle. Replacement requires gearbox removal: $3,000-$5,000.

Cylinder base gaskets: A persistent oil leak from where the cylinders meet the crankcase. This is a common issue on the M64 and can range from a light weep (monitor it) to an active leak (engine-out repair). The repair involves removing the engine, pulling the cylinders, and replacing the base gasket O-rings.

Smoke on start-up: A brief puff of blue smoke on cold start is typical of air-cooled engines as oil seeps past the valve guide seals overnight. Sustained blue smoke under acceleration indicates cylinder or ring wear. Get a compression and leak-down test before purchase; this is non-negotiable.

Gearbox

Manual (G50/05): The Getrag G50 is a strong gearbox. Check for smooth engagement on all gears, no grinding on downshifts (especially 2nd), and a precise shift action. The shift linkage can develop play over time, making shifts feel vague. Aftermarket upgrades (Wevo, Numeric Racing) transform the shift quality. A worn synchro on 2nd gear is common on high-mileage cars.

Tiptronic: The 4-speed Tiptronic automatic was available on the C2. Early units are unreliable and expensive to rebuild ($10,000-$15,000). They also significantly reduce the car’s value and desirability. Unless the Tiptronic is a specific requirement, buy a manual.

Suspension and Steering

Power steering rack: Check for leaks from the rack boots and the rack body. Power steering fluid weeping from the rack is common on 964s. A leaking rack needs replacement or rebuild: $2,000-$4,000.

Damper condition: Bounce each corner of the car and release. It should settle immediately. If it continues bouncing, the dampers are worn. The 964 uses Boge or Bilstein dampers from the factory. A full set of quality replacement dampers (Bilstein B6 or equivalent) runs $2,500-$4,000 fitted.

Control arm bushings: Worn bushings manifest as vague handling, clunking over bumps, and uneven tyre wear. Have the bushings inspected on a hoist with a pry bar.

Body and Corrosion

The 964 body is galvanised and generally well-protected. Structural rust is unusual on these cars. However, check the following:

• Front bumper support: Corrosion behind the front bumper cover, particularly where the support brackets meet the body.
• Battery box area: Acid damage from the battery.
• Front boot floor: Blocked drain holes cause water to pool. Lift the boot carpet and inspect.
• Stone chip damage: The front wings and nose take a beating. Heavy stone chipping left untreated leads to surface corrosion.
• Accident damage: This is a far greater concern than rust. Use a paint depth gauge on every panel. Look for misaligned panel gaps, overspray in door jambs, and different paint textures between panels. A 964 with unreported accident damage is worth 30-50% less than a clean car.

Electrics

Wiring harness: The 964 uses a wiring harness with soy-based insulation that rodents find irresistible. Check for evidence of rodent damage, particularly if the car has been stored in a rural shed. A compromised harness causes intermittent electrical faults and is expensive to diagnose and repair.

Test everything: Windows, mirrors, central locking, sunroof (if fitted), heater fan at all speeds, air conditioning (if fitted), all instruments, all lights. Porsche electrical components are expensive and sometimes discontinued.

Interior

Seat bolsters: The driver’s seat bolster wears first. Cracked or worn leather on the outer bolster indicates high mileage. Retrimming a pair of front seats costs $2,000-$4,000.

Dashboard: The 964 dashboard can warp or crack in extreme heat. A cracked dash is a $3,000-$5,000 replacement.

Headliner: Check for sagging, particularly on coupes with sunroofs. The adhesive fails with age and heat cycling.

Price Guide (2026 AUD)

Carrera 2

Condition	Coupe Manual	Coupe Tiptronic	Cabriolet	Targa
Needs work	$90,000-$120,000	$65,000-$85,000	$80,000-$110,000	$80,000-$105,000
Clean driver	$120,000-$170,000	$85,000-$120,000	$110,000-$150,000	$100,000-$140,000
Excellent	$170,000-$230,000	$120,000-$160,000	$150,000-$200,000	$140,000-$185,000

Carrera 4

Condition	Coupe Manual	Cabriolet	Targa
Needs work	$80,000-$110,000	$75,000-$100,000	$70,000-$95,000
Clean driver	$100,000-$150,000	$95,000-$135,000	$90,000-$125,000
Excellent	$150,000-$200,000	$135,000-$180,000	$125,000-$170,000

Turbo and Special Models

Model	Needs Work	Clean Driver	Excellent
Turbo 3.3	$180,000-$220,000	$220,000-$300,000	$300,000-$400,000
Turbo 3.6	$280,000-$350,000	$350,000-$450,000	$450,000+
RS (Euro)	$350,000-$450,000	$450,000-$600,000	$600,000+
RS America	$200,000-$280,000	$280,000-$380,000	$380,000-$500,000
Speedster (narrow)	$180,000-$250,000	$250,000-$350,000	$350,000-$450,000
Speedster (Turbo Look)	$250,000-$350,000	$350,000-$480,000	$480,000+

Note: Prices are indicative and vary with colour, options, service history, and provenance. Rare factory colours (Guards Red, Speed Yellow, Maritime Blue) command premiums. A Porsche Certificate of Authenticity confirming matching numbers adds 10-20% to any car’s value.

Running Costs

Item	Cost (AUD)
Annual service (oil, filters, inspection)	$1,200-$2,000
Major service (30,000 km interval)	$3,000-$6,000
Timing chain tensioner update (if needed)	$4,000-$7,000
Dual-mass flywheel replacement	$3,000-$5,000
Clutch replacement	$3,500-$5,500
Tyres (205/55R16 front, 225/50R16 rear)	$300-$500 each
Brake pads and rotors (full set)	$2,000-$3,500
Insurance (agreed value)	$3,000-$7,000/year
Specialist labour rate	$150-$220/hour
Engine rebuild (if needed)	$25,000-$45,000

Budget $5,000-$10,000 per year for maintenance and unexpected repairs on a car driven regularly. These are complex, ageing cars and something will always need attention. A healthy reserve fund is essential.

Final Advice

A pre-purchase inspection by an independent Porsche specialist is non-negotiable. This means compression and leak-down testing on all six cylinders, a bore scope inspection of the cylinder bores, a thorough examination of the engine from below on a hoist, and a complete check of all mechanical and electrical systems. Budget $500-$1,000 for this inspection. It will save you tens of thousands.

Buy the best car you can afford with the most complete service history. A 964 that has been serviced every 5,000-10,000 km at a reputable Porsche specialist, with every receipt filed and every oil change documented, is worth significantly more than an identical-looking car with gaps in its records. Service history is the most reliable indicator of how a car has been treated.

Do not buy on colour or options alone. A car with a desirable specification (Guards Red, Sport seats, limited-slip differential) but poor mechanical condition is a money pit. A car in a less fashionable colour (Grand Prix White, black) with an impeccable service history and recent major service is the smarter buy every time.

For a first air-cooled 911, the 964 Carrera 2 manual coupe is the right entry point. It is the lightest, simplest, and most engaging 964 variant. It is also the most affordable way into the air-cooled world in a car that is modern enough to drive with confidence. If the air-cooled experience is what you are looking for, and it almost certainly will be, the C2 will confirm it.