Comparison BMW Z4 (E89) 35i (306 Hp) sDrive Automatic & Opel Astra J GTC 1.4 (100 Hp) Ecotec start/stop
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| Brand: | BMW | Opel |
| Model: | Z4 | Astra |
| Generation: | Z4 (E89) | Astra J GTC |
| Engine / modification: | 35i (306 Hp) sDrive Automatic | 1.4 (100 Hp) Ecotec start/stop |
| Production start: | 2009 year | 2011 year |
| Production end: | 2013 year | 2013 year |
| Coupe type: | Cabriolet | Hatchback |
| Num. of Doors: | 2 | 3 |
| Num. of seats: | 2 | 5 |
| Fuel consumption / economy - urban: | 12.6 l/100 km | 7.2 l/100 km |
| Fuel consumption / economy - extra urban: | 6.9 l/100 km | 5.2 l/100 km |
| Fuel consumption / economy - combined: | 9.0 l/100 km | 5.9 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | |
| Fuel tank volume: | 55 l | 56 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 210 g/km | 139 g/km |
| Power: | 306 hp | 100 hp |
| Max power in: | 5800 rpm. | 6000 rpm. |
| Maximum speed: | 250 km/h | 178 km/h |
| Acceleration from 0 to 100 km/h: | 5.1 sec | 14.5 sec |
| Torque: | 400 Nm @ 1300-5000 rpm. | 130 Nm @ 6000 rpm. |
| Model Engine: | N54B30 | A14XER |
| Engine position: | Front, longitudinal | Front, transverse |
| Engine displacement: | 2979 cm3 | 1398 cm3 |
| Engine oil capacity: | 6.5 l | 4.0 l |
| Coolant: | 8.5 l | |
| Fuel System: | Direct injection | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | Inline | Inline |
| Number of cylinders: | 6 | 4 |
| Number of valves per cylinder: | 4 | |
| Compression ratio: | 10.2 | 10.5 |
| Piston Stroke: | 89.6 mm | 82.6 mm |
| Cylinder Bore: | 84 mm | 73.4 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 8 | |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4239 mm | 4466 mm |
| Width: | 1790 mm | 1840 mm |
| Width including mirrors: | 2020 mm | |
| Height: | 1291 mm | 1482 mm |
| Wheelbase: | 2496 mm | 2695 mm |
| Front track: | 1511 mm | 1584 mm |
| Rear (Back) track: | 1559 mm | 1588 mm |
| Ride height(clearance): | 112 mm | |
| Minimum volume of Luggage (trunk): | 380 l | |
| Maximum amount of Luggage (trunk): | 1165 l | |
| Max weight: | 1855 kg | 1940 kg |
| Front brakes: | Ventilated discs | |
| Rear brakes: | Disc | |
| Kerb Weight: | 1600 kg | 1437 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | |
| Minimum turning circle (turning diameter): | 11.4 m | |
| Tire size: | 225/45 R17 W | 235/55 R17 |
| Wheel rims size: | 8J x 17 | R17 |