Comparison BMW M3 Convertible (E46) 3.2i 24V (343 Hp) & BMW 7 Series (E23, facelift 1983) 728i (184 Hp) Automatic & BMW 1 Series Hatchback (E87) 120d (163 Hp)
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| Brand: | BMW | BMW | BMW |
| Model: | M3 | 7 Series | 1 Series |
| Generation: | M3 Convertible (E46) | 7 Series (E23, facelift 1983) | 1 Series Hatchback (E87) |
| Engine / modification: | 3.2i 24V (343 Hp) | 728i (184 Hp) Automatic | 120d (163 Hp) |
| Production start: | 2001 year | 1983 year | 2004 year |
| Production end: | 2006 year | 1986 year | 2007 year |
| Coupe type: | Cabriolet | Sedan | Hatchback |
| Num. of Doors: | 2 | 4 | 5 |
| Num. of seats: | 4 | 5 | 5 |
| Fuel consumption / economy - urban: | 17.9 l/100 km | 14.5 l/100 km | 7.7 l/100 km |
| Fuel consumption / economy - extra urban: | 8.8 l/100 km | 7.8 l/100 km | 4.6 l/100 km |
| Fuel consumption / economy - combined: | 12.1 l/100 km | 10.7 l/100 km | 5.7 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.35 | 0.40 | |
| Fuel tank volume: | 63 l | 100 l | 50 l |
| CO2 emissions: | 152 g/km | ||
| Power: | 343 hp | 184 hp | 163 hp |
| Max power in: | 7900 rpm. | 5800 rpm. | 4000 rpm. |
| Maximum speed: | 250 km/h | 195 km/h | 220 km/h |
| Acceleration from 0 to 100 km/h: | 5.5 sec | 11.4 sec | 7.9 sec |
| Torque: | 365 Nm @ 4900 rpm. | 240 Nm @ 4200 rpm. | 340 Nm @ 2000 rpm. |
| Model Engine: | S54B32 | M47D20TU2 | |
| Engine position: | Front, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3246 cm3 | 2788 cm3 | 1995 cm3 |
| Engine oil capacity: | 5.5 l | 5.2 l | |
| Coolant: | 6 l | 7.8 l | |
| Fuel System: | Multi-point injection | Multi-point injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbocharger | ||
| Position of cylinders: | Inline | Inline | Inline |
| Valvetrain: | DOHC | - | |
| Number of cylinders: | 6 | 6 | 4 |
| Number of valves per cylinder: | 4 | 2 | 4 |
| Compression ratio: | 11.5 | 9.3 | 17 |
| Piston Stroke: | 91 mm | 80 mm | 90 mm |
| Cylinder Bore: | 87 mm | 86 mm | 84 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | - | 4 | |
| Number of Gears (manual transmission): | 6 | 6 | |
| Length: | 4492 mm | 4860 mm | 4227 mm |
| Width: | 1780 mm | 1800 mm | 1751 mm |
| Width including mirrors: | 1933 mm | ||
| Height: | 1363 mm | 1430 mm | 1430 mm |
| Wheelbase: | 2731 mm | 2795 mm | 2660 mm |
| Front track: | 1508 mm | 1502 mm | 1484 mm |
| Rear (Back) track: | 1525 mm | 1524 mm | 1497 mm |
| Front overhang: | 737 mm | ||
| Rear overhang: | 830 mm | ||
| Minimum volume of Luggage (trunk): | 300 l | 480 l | 330 l |
| Maximum amount of Luggage (trunk): | 1150 l | ||
| Front suspension: | Wishbone | Independent, Spring McPherson, with stabilizer | The depreciated rack |
| Rear suspension: | Helical spring | Independent, spring | The depreciated rack |
| Max weight: | 2100 kg | 1980 kg | 1840 kg |
| Front brakes: | Ventilated discs | Disc | Ventilated discs |
| Rear brakes: | Disc | Drum | Ventilated discs |
| Kerb Weight: | 1655 kg | 1490 kg | 1340 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | ||
| Power steering: | Hydraulic Steering | ||
| Max. roof load: | 75 kg | ||
| Permitted trailer load with brakes (8%): | 1200 kg | ||
| Minimum turning circle (turning diameter): | 11.0 m | 11.6 m | |
| Permitted trailer load with brakes (12%): | 1200 kg | ||
| Permitted trailer load without brakes: | 705 kg | ||
| Permitted towbar download: | 75 kg | ||
| Tire size: | 225/45 R18; 255/40 R18 | 195/70 HR 14 | 195/55 R16 |
| Wheel rims size: | 8J x 18; 9J x 18 | R14 | 6.5J x 16 |