Comparison Opel Astra H Sedan 1.8i 16V (140 Hp) & BMW Z4 (E85, facelift 2006) 2.5i (177 Hp)
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| Brand: | Opel | BMW |
| Model: | Astra | Z4 |
| Generation: | Astra H Sedan | Z4 (E85, facelift 2006) |
| Engine / modification: | 1.8i 16V (140 Hp) | 2.5i (177 Hp) |
| Production start: | 2007 year | 2006 year |
| Production end: | 2010 year | 2008 year |
| Coupe type: | Sedan | Cabriolet |
| Num. of Doors: | 4 | 2 |
| Num. of seats: | 5 | 2 |
| Fuel consumption / economy - urban: | 10 l/100 km | 11.8 l/100 km |
| Fuel consumption / economy - extra urban: | 5.9 l/100 km | 6.1 l/100 km |
| Fuel consumption / economy - combined: | 7.4 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.30 | |
| Fuel tank volume: | 52 l | 55 l |
| Emission standard: | Euro 4 | |
| CO2 emissions: | 178 g/km | |
| Power: | 140 hp | 177 hp |
| Max power in: | 6300 rpm. | 5800 rpm. |
| Maximum speed: | 207 km/h | 229 km/h |
| Acceleration from 0 to 100 km/h: | 10.2 sec | 7.1 sec |
| Torque: | 175 Nm @ 3800 rpm. | 230 Nm @ 3500 rpm. |
| Model Engine: | Z18XER | N52B25 |
| Engine position: | Front, transverse | Front, longitudinal |
| Engine displacement: | 1796 cm3 | 2497 cm3 |
| Engine oil capacity: | 4.5 l | 6.5 l |
| Fuel System: | Multi-point injection | Multi-point injection |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | DOHC | DOHC |
| Number of cylinders: | 4 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10.5 | 11 |
| Piston Stroke: | 88.2 mm | 78.8 mm |
| Cylinder Bore: | 80.5 mm | 82 mm |
| Wheel Drive: | Front wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 4 | |
| Number of Gears (manual transmission): | 5 | 6 |
| Length: | 4587 mm | 4091 mm |
| Width: | 1753 mm | 1781 mm |
| Width with mirrors folded: | 1804 mm | |
| Width including mirrors: | 2033 mm | |
| Height: | 1458 mm | 1299 mm |
| Wheelbase: | 2703 mm | 2495 mm |
| Front track: | 1488 mm | 1473 mm |
| Rear (Back) track: | 1479 mm | 1523 mm |
| Ride height(clearance): | 170 mm | |
| Maximum amount of Luggage (trunk): | 490 l | 260 l |
| Front suspension: | Independent, Spring McPherson, with stabilizer | Independent, Spring McPherson, with stabilizer |
| Rear suspension: | One-piece beam bridge | Helical spring |
| Max weight: | 1800 kg | 1570 kg |
| Front brakes: | Ventilated discs | Disc |
| Rear brakes: | Disc | Disc |
| Kerb Weight: | 1230 kg | 1275 kg |
| ABS: | yes | yes |
| Steering type: | Steering rack and pinion | |
| Max. roof load: | 75 kg | |
| Minimum turning circle (turning diameter): | 11.50 m | |
| Tire size: | 195/65 R15 | 225/50 R16 |
| Wheel rims size: | R15 | R16 |