Comparison Mercedes-Benz S-class SE (W126) 280 SE (185 Hp) & BMW 7 Series (E23, facelift 1983) 732i (197 Hp) & BMW 7 Series (E32, facelift 1992) 730i (218 Hp) & BMW 7 Series L (E38) 750iL (326 Hp) Steptronic & Citroen C4 I Coupe (Phase I, 2004) 2.0 HDi 16V (136 Hp)
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| Brand: | Mercedes-Benz | BMW | BMW | BMW | Citroen |
| Model: | S-class | 7 Series | 7 Series | 7 Series | C4 |
| Generation: | S-class SE (W126) | 7 Series (E23, facelift 1983) | 7 Series (E32, facelift 1992) | 7 Series L (E38) | C4 I Coupe (Phase I, 2004) |
| Engine / modification: | 280 SE (185 Hp) | 732i (197 Hp) | 730i (218 Hp) | 750iL (326 Hp) Steptronic | 2.0 HDi 16V (136 Hp) |
| Production start: | 1979 year | 1983 year | 1992 year | 1994 year | 2004 year |
| Production end: | 1985 year | 1986 year | 1994 year | 1998 year | 2008 year |
| Coupe type: | Sedan | Sedan | Sedan | Sedan | Coupe |
| Num. of Doors: | 4 | 4 | 4 | 4 | 3 |
| Num. of seats: | 5 | 5 | 5 | 5 | 5 |
| Fuel consumption / economy - urban: | 13.4 l/100 km | 16.8 l/100 km | 14.9 l/100 km | 21.2 l/100 km | 7.2 l/100 km |
| Fuel consumption / economy - extra urban: | 9.1 l/100 km | 8.4 l/100 km | 8.3 l/100 km | 10.2 l/100 km | 4.6 l/100 km |
| Fuel consumption / economy - combined: | 11.25 l/100 km | 11.8 l/100 km | 11.1 l/100 km | 14.2 l/100 km | 5.5 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.40 | 0.32 | 0.31 | 0.28 | |
| Fuel tank volume: | 90 l | 100 l | 90 l | 95 l | 60 l |
| Emission standard: | Euro 4 | ||||
| CO2 emissions: | 145 g/km | ||||
| Power: | 185 hp | 197 hp | 218 hp | 326 hp | 136 hp |
| Max power in: | 5800 rpm. | 5500 rpm. | 5800 rpm. | 5000 rpm. | 4000 rpm. |
| Maximum speed: | 210 km/h | 208 km/h | 233 km/h | 250 km/h | 207 km/h |
| Acceleration from 0 to 100 km/h: | 10 sec | 8.6 sec | 8.5 sec | 6.6 sec | 10.5 sec |
| Torque: | 240 Nm @ 4500 rpm. | 285 Nm @ 4300 rpm. | 290 Nm @ 4500 rpm. | 490 Nm @ 3900 rpm. | 320 Nm @ 2000 rpm. |
| Model Engine: | M 110 E 28 / 110.987 | M60B30 | RHR | ||
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal | Front, longitudinal | Front, transverse |
| Engine displacement: | 2746 cm3 | 3210 cm3 | 2997 cm3 | 5379 cm3 | 1997 cm3 |
| Engine oil capacity: | 7 l | 7.5 l | 8.0 l | 5.25 l | |
| Coolant: | 10.5 l | 12.5 l | 13.0 l | 8.1 l | |
| Fuel System: | Direct injection | Multi-point injection | Multi-point injection | Multi-point injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbocharging | ||||
| Position of cylinders: | Inline | Inline | V engine | V engine | Inline |
| Valvetrain: | DOHC | DOHC | SOHC | DOHC | |
| Number of cylinders: | 6 | 6 | 8 | 12 | 4 |
| Number of valves per cylinder: | 2 | 2 | 4 | 4 | 4 |
| Compression ratio: | 9 | 10 | 10.5 | 10 | 18 |
| Piston Stroke: | 78.8 mm | 86 mm | 67.6 mm | 79 mm | 88 mm |
| Cylinder Bore: | 86 mm | 89 mm | 84 mm | 85 mm | 85 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive | |||
| Number of Gears (automatic transmission): | 5 Steptronic | ||||
| Number of Gears (manual transmission): | 4 | 5 | 5 | 6 | |
| Length: | 4995 mm | 4860 mm | 4910 mm | 5124 mm | 4273 mm |
| Width: | 1820 mm | 1800 mm | 1845 mm | 1862 mm | 1769 mm |
| Width including mirrors: | 1964 mm | ||||
| Height: | 1430 mm | 1430 mm | 1411 mm | 1425 mm | 1456 mm |
| Wheelbase: | 2930 mm | 2795 mm | 2832 mm | 3070 mm | 2608 mm |
| Front track: | 1545 mm | 1502 mm | 1530 mm | 1552 mm | 1505 mm |
| Rear (Back) track: | 1517 mm | 1524 mm | 1558 mm | 1568 mm | 1502 mm |
| Front overhang: | 935 mm | ||||
| Rear overhang: | 730 mm | ||||
| Minimum volume of Luggage (trunk): | 480 l | 500 l | 500 l | 314 l | |
| Maximum amount of Luggage (trunk): | 1083 l | ||||
| Front suspension: | Double wishbone | Independent, Spring McPherson, with stabilizer | Coil spring | Wishbone | Independent, Spring McPherson, with stabilizer |
| Rear suspension: | Hydro-pneumatic element | Independent, spring | Helical spring | Inclined Lever | Independent, spring |
| Max weight: | 2080 kg | 2010 kg | 2220 kg | 2530 kg | 1835 kg |
| Front brakes: | Ventilated discs | Disc | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Drum | Disc | Disc | Disc |
| Kerb Weight: | 1560 kg | 1500 kg | 1700 kg | 1995 kg | 1375 kg |
| ABS: | yes | yes | yes | yes | |
| Steering type: | Cone worm with recirculation balls | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion | |
| Power steering: | Hydraulic Steering | Hydraulic Steering | Hydraulic Steering | Electric Steering | |
| Max. roof load: | 75 kg | ||||
| Permitted trailer load with brakes (8%): | 1800 kg | ||||
| Minimum turning circle (turning diameter): | 11.6 m | 11.6 m | 12.2 m | 12 m | |
| Permitted trailer load with brakes (12%): | 1500 kg | ||||
| Permitted trailer load without brakes: | 725 kg | ||||
| Permitted towbar download: | 70 kg | ||||
| Tire size: | Front wheel tires: 195/75 R14 | 205/70 R 14 | 225/60 R15 | 235/50 R16 | 205/55 R16; 205/50 R17 |
| Wheel rims size: | Front wheel rims: 6J x 14 | R14 | R15 | R16 | 6.5J x 16; 6.5J x 17 |