Comparison Mercedes-Benz S-class SEL (W108) 280 SEL 4.5 V8 (198 Hp) Automatic & BMW 3 Series Coupe (E30) 320i (125 Hp) Automatic
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| Brand: | Mercedes-Benz | BMW |
| Model: | S-class | 3 Series |
| Generation: | S-class SEL (W108) | 3 Series Coupe (E30) |
| Engine / modification: | 280 SEL 4.5 V8 (198 Hp) Automatic | 320i (125 Hp) Automatic |
| Production start: | 1971 year | 1982 year |
| Production end: | 1972 year | 1986 year |
| Coupe type: | Sedan | Coupe |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 4 | 2 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 11.6 l/100 km | |
| Fuel consumption / economy - extra urban: | 7.5 l/100 km | |
| Fuel consumption / economy - combined: | 15 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.35 | |
| Fuel tank volume: | 82 l | 55 l |
| Power: | 198 hp | 125 hp |
| Max power in: | 4500 rpm. | 5800 rpm. |
| Maximum speed: | 200 km/h | 191 km/h |
| Acceleration from 0 to 100 km/h: | 10.1 sec | 12 sec |
| Torque: | 358 Nm @ 3000 rpm. | 170 Nm @ 4000 rpm. |
| Model Engine: | M 117 E 45 / 117.984 | M20B20 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 4520 cm3 | 1990 cm3 |
| Engine oil capacity: | 4.5 l | |
| Coolant: | 10.5 l | |
| Fuel System: | Multi-point indirect injection | |
| Aspiration / Turbine: | Naturally aspirated engine | |
| Position of cylinders: | Inline | |
| Valvetrain: | SOHC | |
| Number of cylinders: | 8 | 6 |
| Number of valves per cylinder: | 2 | 2 |
| Compression ratio: | 8 | 9.8 |
| Piston Stroke: | 84.99 mm | 84 mm |
| Cylinder Bore: | 92 mm | 71 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 3 | 4 |
| Length: | 5000 mm | 4325 mm |
| Width: | 1810 mm | 1645 mm |
| Height: | 1440 mm | 1380 mm |
| Wheelbase: | 2850 mm | 2570 mm |
| Front track: | 1482 mm | 1407 mm |
| Rear (Back) track: | 1485 mm | 1415 mm |
| Front overhang: | 761 mm | |
| Rear overhang: | 994 mm | |
| Minimum volume of Luggage (trunk): | 404 l | |
| Front suspension: | Double wishbone | McPherson |
| Rear suspension: | Wishbone | |
| Max weight: | 2168 kg | 1540 kg |
| Front brakes: | Disc | Ventilated discs |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 1705 kg | 1080 kg |
| Steering type: | Cone worm with recirculation balls | Steering rack and pinion |
| Power steering: | Hydraulic Steering | |
| Max. roof load: | 75 kg | |
| Permitted trailer load with brakes (12%): | 1200 kg | |
| Permitted trailer load without brakes: | 500 kg | |
| Tire size: | 195/60 R14 | |
| Wheel rims size: | 6J x 14 | 5.5J x 14 |