Overview
| Spec |
Value |
| Production Years |
1977-1995 |
| Body Style |
2+2 coupe (liftback) |
| Engine(s) |
4.5L SOHC V8, 4.7L DOHC V8, 5.0L DOHC V8, 5.4L DOHC V8 |
| Displacement |
4474cc-5397cc |
| Power |
240-350 hp (depending on variant) |
| Torque |
280-369 lb-ft (depending on variant) |
| Transmission |
5-speed manual, 3-speed auto (early), 4-speed auto (late) |
| Drive |
Rear-wheel drive, rear transaxle layout |
| Suspension (front) |
Independent, double wishbones, coil springs, anti-roll bar, telescopic dampers |
| Suspension (rear) |
Independent, Weissach multi-link with passive rear-steer, coil springs, anti-roll bar, telescopic dampers |
| Brakes |
Ventilated discs front and rear, servo-assisted, ABS (from S4) |
| Steering |
Rack and pinion, power-assisted |
| Construction |
Steel monocoque with aluminium doors, bonnet, and front guards |
928 (1977-1982)
| Spec |
Value |
| Engine |
M28/01, 4.5L SOHC V8 (2 valves per cylinder) |
| Displacement |
4474cc |
| Bore x Stroke |
95.0mm x 78.9mm |
| Compression Ratio |
8.5:1 |
| Fuel System |
Bosch K-Jetronic continuous fuel injection |
| Power |
240 hp (176 kW) @ 5250 rpm |
| Torque |
280 lb-ft (380 Nm) @ 3600 rpm |
| Transmission |
5-speed manual or 3-speed Mercedes-Benz automatic, rear transaxle |
| 0-100 km/h |
~7.5 seconds |
| Top Speed |
230 km/h (143 mph) |
| Fuel Economy |
14-18 L/100km |
| Kerb Weight |
1450 kg |
| Length |
4520mm |
| Width |
1836mm |
| Height |
1282mm |
| Wheelbase |
2500mm |
| Track (front/rear) |
1551mm / 1530mm |
| Fuel Tank |
86 litres |
| Tyres |
225/50 VR 16 |
928 S (1980-1986)
| Spec |
Value |
| Engine |
M28/07-10, 4.7L DOHC V8 (4 valves per cylinder, 32V) |
| Displacement |
4664cc |
| Bore x Stroke |
97.0mm x 78.9mm |
| Compression Ratio |
10.0:1 |
| Fuel System |
Bosch K-Jetronic continuous fuel injection (early), Bosch LH-Jetronic (late) |
| Power |
310 hp (228 kW) @ 5900 rpm (European spec) |
| Torque |
295 lb-ft (400 Nm) @ 4500 rpm |
| Transmission |
5-speed manual or 3-speed Mercedes-Benz automatic, rear transaxle |
| 0-100 km/h |
~6.2 seconds |
| Top Speed |
250 km/h (155 mph) |
| Fuel Economy |
14-19 L/100km |
| Kerb Weight |
1500 kg |
| Length |
4520mm |
| Width |
1836mm |
| Height |
1282mm |
| Wheelbase |
2500mm |
| Track (front/rear) |
1551mm / 1530mm |
| Fuel Tank |
86 litres |
| Tyres |
225/50 VR 16 front, 245/45 VR 16 rear |
928 S4 (1987-1991)
| Spec |
Value |
| Engine |
M28/41-42, 5.0L DOHC V8 (4 valves per cylinder, 32V) |
| Displacement |
4957cc |
| Bore x Stroke |
100.0mm x 78.9mm |
| Compression Ratio |
10.0:1 |
| Fuel System |
Bosch LH-Jetronic electronic fuel injection |
| Power |
320 hp (235 kW) @ 6000 rpm |
| Torque |
317 lb-ft (430 Nm) @ 4100 rpm |
| Transmission |
5-speed manual or 4-speed Mercedes-Benz automatic, rear transaxle |
| 0-100 km/h |
~5.9 seconds |
| Top Speed |
270 km/h (168 mph) |
| Fuel Economy |
14-19 L/100km |
| Kerb Weight |
1570 kg |
| Length |
4520mm |
| Width |
1836mm |
| Height |
1282mm |
| Wheelbase |
2500mm |
| Track (front/rear) |
1551mm / 1530mm |
| Fuel Tank |
86 litres |
| Tyres |
225/50 ZR 16 front, 245/45 ZR 16 rear |
| Brakes (front) |
Ventilated discs, 304mm |
| Brakes (rear) |
Ventilated discs, 299mm |
| ABS |
Standard |
928 GT (1989-1991)
| Spec |
Value |
| Engine |
M28/44, 5.0L DOHC V8 (4 valves per cylinder, 32V) |
| Displacement |
4957cc |
| Bore x Stroke |
100.0mm x 78.9mm |
| Compression Ratio |
10.0:1 |
| Fuel System |
Bosch LH-Jetronic electronic fuel injection |
| Power |
330 hp (243 kW) @ 6200 rpm |
| Torque |
317 lb-ft (430 Nm) @ 4100 rpm |
| Transmission |
5-speed manual (standard), 4-speed Mercedes-Benz automatic (optional) |
| 0-100 km/h |
~5.6 seconds |
| Top Speed |
275 km/h (171 mph) |
| Fuel Economy |
15-20 L/100km |
| Kerb Weight |
1570 kg |
| Length |
4520mm |
| Width |
1836mm |
| Height |
1275mm |
| Wheelbase |
2500mm |
| Track (front/rear) |
1551mm / 1530mm |
| Fuel Tank |
86 litres |
| Tyres |
225/50 ZR 16 front, 245/45 ZR 16 rear |
| Brakes (front) |
Ventilated discs, 304mm |
| Brakes (rear) |
Ventilated discs, 299mm |
| ABS |
Standard |
928 GTS (1992-1995)
| Spec |
Value |
| Engine |
M28/49-50, 5.4L DOHC V8 (4 valves per cylinder, 32V) |
| Displacement |
5397cc |
| Bore x Stroke |
100.0mm x 85.9mm |
| Compression Ratio |
10.4:1 |
| Fuel System |
Bosch LH-Jetronic electronic fuel injection |
| Power |
350 hp (257 kW) @ 5700 rpm |
| Torque |
369 lb-ft (500 Nm) @ 4250 rpm |
| Transmission |
5-speed manual or 4-speed Mercedes-Benz automatic, rear transaxle |
| 0-100 km/h |
~5.2 seconds |
| Top Speed |
270 km/h (168 mph, electronically limited) |
| Fuel Economy |
15-20 L/100km |
| Kerb Weight |
1620 kg |
| Length |
4520mm |
| Width |
1836mm |
| Height |
1282mm |
| Wheelbase |
2500mm |
| Track (front/rear) |
1551mm / 1560mm |
| Fuel Tank |
86 litres |
| Tyres |
225/45 ZR 17 front, 255/40 ZR 17 rear |
| Brakes (front) |
Ventilated discs, 304mm |
| Brakes (rear) |
Ventilated discs, 299mm |
| ABS |
Standard |
Dimensions Comparison
| Dimension |
928 |
928 S |
928 S4 |
928 GT |
928 GTS |
| Length |
4520mm |
4520mm |
4520mm |
4520mm |
4520mm |
| Width |
1836mm |
1836mm |
1836mm |
1836mm |
1836mm |
| Height |
1282mm |
1282mm |
1282mm |
1275mm |
1282mm |
| Wheelbase |
2500mm |
2500mm |
2500mm |
2500mm |
2500mm |
| Kerb Weight |
1450 kg |
1500 kg |
1570 kg |
1570 kg |
1620 kg |
| Rear Track |
1530mm |
1530mm |
1530mm |
1530mm |
1560mm |
| Fuel Tank |
86 litres |
86 litres |
86 litres |
86 litres |
86 litres |
Engine Evolution
| Variant |
Engine Code |
Displacement |
Valvetrain |
Power |
Torque |
| 928 |
M28/01 |
4474cc |
SOHC 16V |
240 hp @ 5250 rpm |
280 lb-ft @ 3600 rpm |
| 928 S |
M28/07-10 |
4664cc |
DOHC 32V |
310 hp @ 5900 rpm |
295 lb-ft @ 4500 rpm |
| 928 S4 |
M28/41-42 |
4957cc |
DOHC 32V |
320 hp @ 6000 rpm |
317 lb-ft @ 4100 rpm |
| 928 GT |
M28/44 |
4957cc |
DOHC 32V |
330 hp @ 6200 rpm |
317 lb-ft @ 4100 rpm |
| 928 GTS |
M28/49-50 |
5397cc |
DOHC 32V |
350 hp @ 5700 rpm |
369 lb-ft @ 4250 rpm |
Transmission Options
| Variant |
Manual |
Automatic |
| 928 (1977-82) |
5-speed manual (Porsche) |
3-speed automatic (Mercedes-Benz) |
| 928 S (1980-86) |
5-speed manual (Porsche) |
3-speed automatic (Mercedes-Benz) |
| 928 S4 (1987-91) |
5-speed manual (Porsche) |
4-speed automatic (Mercedes-Benz) |
| 928 GT (1989-91) |
5-speed manual (standard) |
4-speed automatic (optional) |
| 928 GTS (1992-95) |
5-speed manual (Porsche) |
4-speed automatic (Mercedes-Benz) |
All transmissions are rear-mounted in a transaxle configuration, connected to the engine via a rigid aluminium torque tube.
Production Numbers
| Variant |
Years |
Approximate Production |
| 928 |
1977-1982 |
~17,710 |
| 928 S |
1980-1986 |
~19,136 |
| 928 S4 |
1987-1991 |
~16,669 |
| 928 GT |
1989-1991 |
~2,897 |
| 928 GTS |
1992-1995 |
~2,831 |
| Total |
1977-1995 |
~61,056 |
Key Technical Features
| Feature |
Description |
| Weissach Rear Axle |
Multi-link rear suspension with compliant bushings providing passive rear-steer under braking for improved stability |
| Transaxle Layout |
Engine at front, gearbox at rear, connected by aluminium torque tube. Provides near-50:50 weight distribution |
| Aluminium Construction |
All-aluminium V8 engine, aluminium doors, bonnet, and front guards on steel monocoque body |
| Pop-up Headlights |
Standard on 928, 928 S, and some early S4 markets. Flush headlights from S4 onwards |
| PSD |
Porsche Slip Differential (viscous limited-slip), fitted to S4 and later models |
| ABS |
Anti-lock braking system, standard from S4 onwards |