Comparison BMW 3 Series Sedan (E90) 320si (173 Hp) & Opel Astra K 1.4 Turbo (125 Hp)
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| Brand: | BMW | Opel |
| Model: | 3 Series | Astra |
| Generation: | 3 Series Sedan (E90) | Astra K |
| Engine / modification: | 320si (173 Hp) | 1.4 Turbo (125 Hp) |
| Production start: | 2006 year | 2018 year |
| Production end: | 2007 year | 2019 year |
| Coupe type: | Sedan | Hatchback |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 4 | 5 |
| Num. of seats: | 5 | 5 |
| Fuel consumption / economy - urban: | 12.8 l/100 km | 6.9-7.0 l/100 km |
| Fuel consumption / economy - extra urban: | 6.6 l/100 km | 4.6-4.8 l/100 km |
| Fuel consumption / economy - combined: | 8.9 l/100 km | 5.4-5.6 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Fuel tank volume: | 63 l | 48 l |
| Emission standard: | Euro 6d-Temp | |
| CO2 emissions: | 214 g/km | 125-128 g/km |
| Power: | 173 hp | 125 hp |
| Max power in: | 7000 rpm. | 4000-5600 rpm. |
| Maximum speed: | 225 km/h | 205 km/h |
| Acceleration from 0 to 100 km/h: | 8.1 sec | 9.5 sec |
| Torque: | 200 Nm @ 4250 rpm. | 230 Nm @ 2000-3500 rpm. |
| Model Engine: | N45B20 | D14XFL |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 1997 cm3 | 1399 cm3 |
| Engine oil capacity: | 4.5 l | 4.0 l |
| Fuel System: | Multi-point indirect injection | Direct injection |
| Aspiration / Turbine: | Naturally aspirated engine | Turbocharger |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | DOHC | |
| Number of cylinders: | 4 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 11 | 10 |
| Piston Stroke: | 88 mm | 81.3 mm |
| Cylinder Bore: | 85 mm | 74 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (manual transmission): | 6 | 6 |
| Length: | 4520 mm | 4370 mm |
| Width: | 1817 mm | 1809 mm |
| Width with mirrors folded: | 1871 mm | |
| Width including mirrors: | 2013 mm | 2042 mm |
| Height: | 1421 mm | 1485 mm |
| Wheelbase: | 2760 mm | 2662 mm |
| Front track: | 1500 mm | 1544 mm |
| Rear (Back) track: | 1513 mm | 1558 mm |
| Front overhang: | 755 mm | |
| Rear overhang: | 1005 mm | |
| Minimum volume of Luggage (trunk): | 460 l | 370 l |
| Maximum amount of Luggage (trunk): | 1210 l | |
| Front suspension: | Independent, Spring McPherson, with stabilizer | |
| Rear suspension: | Independent, spring multi-link with stabilizer | |
| Max weight: | 1870 kg | 1815 kg |
| Front brakes: | Ventilated discs | Disc |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 1425 kg | 1203 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering |
| Max. roof load: | 75 kg | 75 kg |
| Minimum turning circle (turning diameter): | 11.05 m | |
| Permitted trailer load with brakes (12%): | 1450 kg | |
| Permitted trailer load without brakes: | 620 kg | |
| Tire size: | 225/40 R18; 255/35 R18 | 205/55 R16 |
| Wheel rims size: | 8J x 18; 8.5J x 18 | 6.5J x 16; 7J x 16 |