Comparison BMW 7 Series (E23, facelift 1983) 745i (252 Hp) Automatic & BMW 3 Series Touring (E46, facelift 2001) 318 Ci (143 Hp)
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| Brand: | BMW | BMW |
| Model: | 7 Series | 3 Series |
| Generation: | 7 Series (E23, facelift 1983) | 3 Series Touring (E46, facelift 2001) |
| Engine / modification: | 745i (252 Hp) Automatic | 318 Ci (143 Hp) |
| Production start: | 1983 year | 2001 year |
| Production end: | 1986 year | 2005 year |
| Coupe type: | Sedan | Combi |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 16.6 l/100 km | 10.6 l/100 km |
| Fuel consumption / economy - extra urban: | 8.4 l/100 km | 5.9 l/100 km |
| Fuel consumption / economy - combined: | 11.8 l/100 km | 7.6 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.40 | |
| Fuel tank volume: | 100 l | 63 l |
| Power: | 252 hp | 143 hp |
| Max power in: | 4900 rpm. | 6000 rpm. |
| Maximum speed: | 227 km/h | 213 km/h |
| Acceleration from 0 to 100 km/h: | 7.9 sec | 9.6 sec |
| Torque: | 380 Nm @ 2200 rpm. | 200 Nm @ 3750 rpm. |
| Model Engine: | M102B34 | N42B20 |
| Engine position: | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3430 cm3 | 1995 cm3 |
| Engine oil capacity: | 4.25 l | |
| Coolant: | 7.5 l | |
| Fuel System: | Multi-point injection | Multi-point injection |
| Aspiration / Turbine: | Turbocharger | |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | DOHC | |
| Number of cylinders: | 6 | 4 |
| Number of valves per cylinder: | 2 | 4 |
| Compression ratio: | 8 | 10.2 |
| Piston Stroke: | 86 mm | 90 mm |
| Cylinder Bore: | 92 mm | 84 mm |
| Wheel Drive: | Rear wheel drive | |
| Number of Gears (automatic transmission): | 4 | |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4860 mm | 4480 mm |
| Width: | 1800 mm | 1740 mm |
| Height: | 1430 mm | 1410 mm |
| Wheelbase: | 2795 mm | 2725 mm |
| Front track: | 1502 mm | 1470 mm |
| Rear (Back) track: | 1524 mm | 1485 mm |
| Ride height(clearance): | 132 mm | |
| Minimum volume of Luggage (trunk): | 480 l | 435 l |
| Maximum amount of Luggage (trunk): | 1345 l | |
| Front suspension: | Independent, Spring McPherson, with stabilizer | Wishbone |
| Rear suspension: | Independent, spring multi-link with stabilizer | Helical spring |
| Max weight: | 2100 kg | 1935 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 1590 kg | 1395 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | |
| Power steering: | Hydraulic Steering | |
| Minimum turning circle (turning diameter): | 11.6 m | |
| Tire size: | 195/70 R14 | 205/55 R16 |
| Wheel rims size: | 6.5J x 14 | 7J x 16 |