Comparison BMW M3 Coupe (E46) 3.2i 24V (343 Hp) & BMW 6 Series (E63) 645 Ci (333 Hp) Automatic
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| Brand: | BMW | BMW |
| Model: | M3 | 6 Series |
| Generation: | M3 Coupe (E46) | 6 Series (E63) |
| Engine / modification: | 3.2i 24V (343 Hp) | 645 Ci (333 Hp) Automatic |
| Production start: | 2000 year | 2003 year |
| Production end: | 2003 year | 2005 year |
| Coupe type: | Coupe | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 5 | 2+2 |
| Fuel consumption / economy - urban: | 17.8 l/100 km | 16.1 l/100 km |
| Fuel consumption / economy - extra urban: | 8.4 l/100 km | 8.0 l/100 km |
| Fuel consumption / economy - combined: | 11.9 l/100 km | 10.9 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | 0.29 |
| Fuel tank volume: | 63 l | 70 l |
| Emission standard: | Euro 4 | |
| CO2 emissions: | 264 g/km | |
| Power: | 343 hp | 333 hp |
| Max power in: | 7900 rpm. | 6100 rpm. |
| Maximum speed: | 250 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 5.2 sec | 5.8 sec |
| Torque: | 365 Nm @ 4900 rpm. | 450 Nm @ 3600 rpm. |
| Model Engine: | S54B32 | N63B44 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3246 cm3 | 4398 cm3 |
| Engine oil capacity: | 5.5 l | 8.0 l |
| Coolant: | 6 l | 14.2 l |
| Fuel System: | Multi-point injection | Multi-point injection |
| Position of cylinders: | Inline | V engine |
| Valvetrain: | DOHC | DOHC |
| Number of cylinders: | 6 | 8 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 11.5 | 10 |
| Piston Stroke: | 91 mm | 82.7 mm |
| Cylinder Bore: | 87 mm | 92 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | - | 6 |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4492 mm | 4820 mm |
| Width: | 1780 mm | 1855 mm |
| Height: | 1372 mm | 1373 mm |
| Wheelbase: | 2731 mm | 2780 mm |
| Front track: | 1508 mm | 1558 mm |
| Rear (Back) track: | 1525 mm | 1592 mm |
| Minimum volume of Luggage (trunk): | 410 l | 450 l |
| Front suspension: | Wishbone | Coil spring |
| Rear suspension: | Helical spring | Helical spring |
| Max weight: | 2000 kg | 2065 kg |
| Front brakes: | Ventilated discs | Disc |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1495 kg | 1695 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering |
| Minimum turning circle (turning diameter): | 11.0 m | 11.4 m |
| Tire size: | 225/45 R18; 255/40 R18 | 245/45 R18 |
| Wheel rims size: | 8J x 18; 9J x 18 | 8J X 18 |