Mazda RX-7 FB, Full Specifications

Key Specifications

Spec	Value
Production Years	1978-1985
Manufacturer	Mazda Motor Corporation (Toyo Kogyo)
Assembly	Hiroshima, Japan
Internal Designation	SA22C (Series 1-2), FB (Series 3)
Body Style	2-door hatchback coupe
Layout	Front-mid engine, rear-wheel drive
Wheelbase	2,420 mm
Overall Length	4,285 mm
Overall Width	1,675 mm
Overall Height	1,260 mm
Kerb Weight	1,020 kg (12A), 1,050 kg (13B)
Fuel Tank Capacity	60 L
Cargo Capacity	Approx. 350 L (seats up)
Drag Coefficient	0.36
Weight Distribution	50.7:49.3 front:rear

Engine Specifications

12A (Series 1 and Series 2, 1978-1983)

Spec	Value
Type	Twin-rotor Wankel rotary
Designation	12A
Displacement	1,146 cc (2 x 573 cc)
Compression Ratio	9.4:1
Power	74 kW (100 hp) @ 6,000 rpm
Torque	137 Nm @ 4,000 rpm
Fuel System	Nikki 4-barrel carburettor
Ignition	Points distributor (Series 1), electronic distributor (Series 2)
Cooling	Water-cooled
Lubrication	Wet sump with oil metering pump
Oil Capacity	4.0 L (with filter)
Recommended Oil	20W-50 mineral
Redline	7,500 rpm

13B (Series 3, 1983-1985)

Spec	Value
Type	Twin-rotor Wankel rotary
Designation	13B
Displacement	1,308 cc (2 x 654 cc)
Compression Ratio	9.4:1
Power	100 kW (135 hp) @ 6,000 rpm
Torque	170 Nm @ 4,000 rpm
Fuel System	Nikki 4-barrel carburettor
Ignition	Electronic distributor
Cooling	Water-cooled
Lubrication	Wet sump with oil metering pump
Oil Capacity	4.5 L (with filter)
Recommended Oil	20W-50 mineral
Redline	7,500 rpm

Rotary Engine Internal Components

Component	Quantity (per rotor)	Notes
Apex Seals	3	Primary combustion chamber seal
Side Seals	6 (3 per side)	Seal rotor face to side housing
Corner Seals	6 (3 per side)	Seal apex/side seal junction
Oil Seals	6 (3 per side)	Control oil consumption
Apex Seal Springs	3	Maintain seal tension against housing

Transmission

Spec	Value
Standard	5-speed manual
Optional	3-speed automatic
Clutch	Single dry plate, hydraulic actuation

5-Speed Manual Gear Ratios

Gear	Ratio
1st	3.483
2nd	2.015
3rd	1.391
4th	1.000
5th	0.814
Reverse	3.383

Final Drive Ratios

Variant	Ratio
12A Manual	3.909
13B Manual	3.909
Automatic	3.636

Suspension

Component	Front	Rear
Type	Independent, MacPherson strut	Live axle with Watts linkage
Springs	Coil	Coil
Dampers	Gas-pressurised telescopic	Gas-pressurised telescopic
Anti-roll Bar	Yes	Yes

Brakes

Component	Front	Rear
Type (12A)	Solid disc	Drum
Type (13B)	Ventilated disc	Solid disc
Front Disc Diameter	245 mm (12A), 252 mm (13B)
Booster	Vacuum assisted
ABS	Not available

Steering

Spec	Value
Type	Recirculating ball
Power Assist	Optional (standard on later models)
Turns Lock-to-Lock	3.2
Turning Circle	9.6 m

Performance (approximate, period road tests)

Variant	0-100 km/h	Quarter Mile	Top Speed
12A Manual	9.8 s	~17.0 s	190 km/h
12A Automatic	12.0 s	~18.5 s	175 km/h
13B Manual	8.5 s	~16.0 s	200 km/h
13B Automatic	10.5 s	~17.5 s	185 km/h

Fuel Economy (approximate, mixed driving)

Variant	L/100 km
12A Manual	12-14
12A Automatic	13-15
13B Manual	14-16
13B Automatic	14-17

Tyre Specifications

Variant	Size
Series 1 (standard)	185/70SR13
Series 2 (standard)	185/70SR13
Series 3 (standard)	195/60HR14
Series 3 (sport)	195/60HR14
Common Upgrade	205/50R15

Wheel Specifications

Spec	Value
Series 1-2 Standard	13” x 5.0” steel
Series 3 Standard	14” x 5.5” alloy
Bolt Pattern	4 x 114.3
Centre Bore	54.1 mm

Electrical

Spec	Value
Battery	12V, 55 Ah
Alternator	45A (early), 60A (later)
Headlights	Pop-up, H4 halogen
Ignition	Points (Series 1), Electronic (Series 2-3)

Service Intervals

Service Item	Interval
Engine oil and filter	5,000 km or 3 months
Spark plugs (leading and trailing)	15,000-20,000 km
Compression test	Annually (recommended)
Coolant	24 months or 40,000 km
Gearbox oil (manual)	40,000 km
Differential oil	40,000 km
Brake fluid	24 months
Air filter	20,000 km

Model Variants (Australian Market)

Series 1 (12A, 1979-1980)

Spec	Value
Engine	12A (1,146 cc)
Power	74 kW (100 hp)
Kerb Weight	1,020 kg
Standard Equipment	Power windows, AM/FM radio

Series 2 (12A, 1980-1983)

Spec	Value
Engine	12A (1,146 cc)
Power	74 kW (100 hp)
Kerb Weight	1,030 kg
Standard Equipment	As Series 1 plus improved interior trim

Series 3 (13B, 1983-1985)

Spec	Value
Engine	13B (1,308 cc)
Power	100 kW (135 hp)
Kerb Weight	1,050 kg
Standard Equipment	Air conditioning, power steering, alloy wheels
Additional	Improved brakes, revised suspension

Production Numbers (Worldwide, Approximate)

Variant	Units
FB RX-7 Total (all series)	~474,000
Series 1	~150,000
Series 2	~185,000
Series 3	~139,000