Comparison BMW 3 Series (E21) 315 (75 Hp) & Opel Astra J 1.4 Turbo (140 Hp)
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| Brand: | BMW | Opel |
| Model: | 3 Series | Astra |
| Generation: | 3 Series (E21) | Astra J |
| Engine / modification: | 315 (75 Hp) | 1.4 Turbo (140 Hp) |
| Production start: | 1981 year | 2009 year |
| Production end: | 1984 year | 2012 year |
| Coupe type: | Sedan | Hatchback |
| Num. of Doors: | 2 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 10.5 l/100 km | 7.8 l/100 km |
| Fuel consumption / economy - extra urban: | 6.8 l/100 km | 4.8 l/100 km |
| Fuel consumption / economy - combined: | 5.9 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | |
| Fuel tank volume: | 58 l | 56 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 137 g/km | |
| Power: | 75 hp | 140 hp |
| Max power in: | 5800 rpm. | 4900 rpm. |
| Maximum speed: | 154 km/h | 204 km/h |
| Acceleration from 0 to 100 km/h: | 14.8 sec | 9.7 sec |
| Torque: | 110 Nm @ 3200 rpm. | 200 Nm @ 1850-4900 rpm. |
| Model Engine: | M10 | A14NET |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 1573 cm3 | 1364 cm3 |
| Engine oil capacity: | 4.0 l | 4.0 l |
| Fuel System: | Carburettor | Multi-point injection |
| Aspiration / Turbine: | Turbocharging | |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | OHC | |
| Number of cylinders: | 4 | 4 |
| Number of valves per cylinder: | 2 | 4 |
| Compression ratio: | 9.1 | 9.5 |
| Piston Stroke: | 71 mm | 82.6 mm |
| Cylinder Bore: | 84 mm | 72.5 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 6 | |
| Number of Gears (manual transmission): | 4 | 6 |
| Length: | 4355 mm | 4419 mm |
| Width: | 1610 mm | 1814 mm |
| Width including mirrors: | 2013 mm | |
| Height: | 1380 mm | 1510 mm |
| Wheelbase: | 2536 mm | 2685 mm |
| Front track: | 1366 mm | 1541 mm |
| Rear (Back) track: | 1373 mm | 1551 mm |
| Ride height(clearance): | 160 mm | |
| Minimum volume of Luggage (trunk): | 404 l | 370 l |
| Maximum amount of Luggage (trunk): | 1235 l | |
| Max weight: | 1440 kg | 1870 kg |
| Front brakes: | Disc | |
| Rear brakes: | Drum | |
| Kerb Weight: | 1010 kg | 1298 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Minimum turning circle (turning diameter): | 10.4 m | 11.4 m |
| Tire size: | 165/80 R13 | 215/50 R17 |
| Wheel rims size: | R13 | R17 |