Comparison BMW Z4 (E89, facelift 2013) 20i (184 Hp) sDrive & Opel Astra H (facelift 2007) 1.9 CDTI ECOTEC (150 Hp)
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| Brand: | BMW | Opel |
| Model: | Z4 | Astra |
| Generation: | Z4 (E89, facelift 2013) | Astra H (facelift 2007) |
| Engine / modification: | 20i (184 Hp) sDrive | 1.9 CDTI ECOTEC (150 Hp) |
| Production start: | 2013 year | 2007 year |
| Production end: | 2016 year | 2009 year |
| Coupe type: | Cabriolet | Hatchback |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 2 | 5 |
| Num. of seats: | 2 | 5 |
| Fuel consumption / economy - urban: | 8.9 l/100 km | |
| Fuel consumption / economy - extra urban: | 5.6 l/100 km | |
| Fuel consumption / economy - combined: | 6.8 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.34 | 0.32 |
| Fuel tank volume: | 55 l | 52 l |
| Emission standard: | Euro 6 | Euro 4 |
| CO2 emissions: | 159 g/km | |
| Power: | 184 hp | 150 hp |
| Max power in: | 5000 rpm. | 4000 rpm. |
| Maximum speed: | 235 km/h | 208 km/h |
| Acceleration from 0 to 100 km/h: | 6.9 sec | 8.9 sec |
| Torque: | 270 Nm @ 1250-4500 rpm. | 320 Nm @ 2000-2750 rpm. |
| Model Engine: | N20B20 | Z19DTH |
| Engine position: | Front, longitudinal | |
| Engine displacement: | 1997 cm3 | 1910 cm3 |
| Engine oil capacity: | 4.75 l | 4.3 l |
| Coolant: | 8.2 l | 7 l |
| Fuel System: | Direct injection | |
| Aspiration / Turbine: | Twin-power turbo | |
| Position of cylinders: | Inline | |
| Valvetrain: | DOHC | |
| Number of cylinders: | 4 | 4 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 10 | 17.5 |
| Piston Stroke: | 90.1 mm | 90.4 mm |
| Cylinder Bore: | 84 mm | 82 mm |
| Wheel Drive: | Rear wheel drive | Front wheel drive |
| Number of Gears (manual transmission): | 6 | |
| Length: | 4239 mm | 4249 mm |
| Width: | 1790 mm | 1753 mm |
| Width with mirrors folded: | 1804 mm | |
| Width including mirrors: | 2033 mm | |
| Height: | 1291 mm | 1460 mm |
| Wheelbase: | 2496 mm | 2614 mm |
| Front track: | 1511 mm | 1488 mm |
| Rear (Back) track: | 1559 mm | 1488 mm |
| Ride height(clearance): | 130 mm | |
| Front overhang: | 871 mm | |
| Rear overhang: | 764 mm | |
| Minimum volume of Luggage (trunk): | 180 l | 380 l |
| Maximum amount of Luggage (trunk): | 310 l | 1295 l |
| Front suspension: | Double wishbone | |
| Rear suspension: | Multi-link independent | Torsion |
| Max weight: | 1725 kg | 1900 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Disc |
| Kerb Weight: | 1395 kg | 1318 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Electric Steering | Electric Steering |
| Max. roof load: | 75 kg | |
| Minimum turning circle (turning diameter): | 10.7 m | 11.2 m |
| Permitted trailer load with brakes (12%): | 1500 kg | |
| Permitted trailer load without brakes: | 690 kg | |
| Tire size: | 225/45 R17 | 205/55 R16; 225/45 R17; 225/40 R18 |
| Wheel rims size: | 8J x 17 | 6.5J x 16; 7J x 17; 7.5J x 18 |