Comparison BMW Z4 (E89) 35i (306 Hp) sDrive Automatic & Opel Astra J GTC 1.4 (100 Hp) Ecotec start/stop & Acura TL III (UA6/7) 3.2 i V6 24V (261 Hp) Automatic
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| Brand: | BMW | Opel | Acura |
| Model: | Z4 | Astra | TL |
| Generation: | Z4 (E89) | Astra J GTC | TL III (UA6/7) |
| Engine / modification: | 35i (306 Hp) sDrive Automatic | 1.4 (100 Hp) Ecotec start/stop | 3.2 i V6 24V (261 Hp) Automatic |
| Production start: | 2009 year | 2011 year | 2006 year |
| Production end: | 2013 year | 2013 year | 2008 year |
| Coupe type: | Cabriolet | Hatchback | Sedan |
| Num. of Doors: | 2 | 3 | 4 |
| Num. of seats: | 2 | 5 | 5 |
| Fuel consumption / economy - urban: | 12.6 l/100 km | 7.2 l/100 km | 11.8 l/100 km |
| Fuel consumption / economy - extra urban: | 6.9 l/100 km | 5.2 l/100 km | 8.1 l/100 km |
| Fuel consumption / economy - combined: | 9.0 l/100 km | 5.9 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | ||
| Fuel tank volume: | 55 l | 56 l | 65 l |
| Emission standard: | Euro 5 | ||
| CO2 emissions: | 210 g/km | 139 g/km | |
| Power: | 306 hp | 100 hp | 261 hp |
| Max power in: | 5800 rpm. | 6000 rpm. | 6200 rpm. |
| Maximum speed: | 250 km/h | 178 km/h | 225 km/h |
| Acceleration from 0 to 100 km/h: | 5.1 sec | 14.5 sec | 6 sec |
| Torque: | 400 Nm @ 1300-5000 rpm. | 130 Nm @ 6000 rpm. | 316 Nm @ 5000 rpm. |
| Model Engine: | N54B30 | A14XER | J32A3 |
| Engine position: | Front, longitudinal | Front, transverse | Front, transverse |
| Engine displacement: | 2979 cm3 | 1398 cm3 | 3210 cm3 |
| Engine oil capacity: | 6.5 l | 4.0 l | 4.3 l |
| Coolant: | 8.5 l | 8.2 l | |
| Fuel System: | Direct injection | Multi-point injection | Multi-point injection |
| Aspiration / Turbine: | Twin-power turbo | ||
| Position of cylinders: | Inline | Inline | V engine |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 6 | 4 | 6 |
| Number of valves per cylinder: | 4 | 4 | |
| Compression ratio: | 10.2 | 10.5 | 11 |
| Piston Stroke: | 89.6 mm | 82.6 mm | 86 mm |
| Cylinder Bore: | 84 mm | 73.4 mm | 89 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 8 | 5 | |
| Number of Gears (manual transmission): | 5 | ||
| Length: | 4239 mm | 4466 mm | 4808 mm |
| Width: | 1790 mm | 1840 mm | 1835 mm |
| Width including mirrors: | 2020 mm | ||
| Height: | 1291 mm | 1482 mm | 1440 mm |
| Wheelbase: | 2496 mm | 2695 mm | 2740 mm |
| Front track: | 1511 mm | 1584 mm | 1577 mm |
| Rear (Back) track: | 1559 mm | 1588 mm | 1575 mm |
| Ride height(clearance): | 112 mm | ||
| Minimum volume of Luggage (trunk): | 380 l | 354 l | |
| Maximum amount of Luggage (trunk): | 1165 l | ||
| Front suspension: | Coil spring | ||
| Rear suspension: | Helical spring | ||
| Max weight: | 1855 kg | 1940 kg | |
| Front brakes: | Ventilated discs | Ventilated discs | |
| Rear brakes: | Disc | Disc | |
| Kerb Weight: | 1600 kg | 1437 kg | 1655 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Hydraulic Steering | |
| Minimum turning circle (turning diameter): | 11.4 m | ||
| Tire size: | 225/45 R17 W | 235/55 R17 | 235/45 R17 |
| Wheel rims size: | 8J x 17 | R17 | R17 |