Comparison Opel Astra J GTC 1.7 CDTI (110 Hp) Ecotec start/stop & BMW 1 Series Convertible (E88) 135i (306 Hp)
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| Brand: | Opel | BMW |
| Model: | Astra | 1 Series |
| Generation: | Astra J GTC | 1 Series Convertible (E88) |
| Engine / modification: | 1.7 CDTI (110 Hp) Ecotec start/stop | 135i (306 Hp) |
| Production start: | 2011 year | 2008 year |
| Production end: | 2014 year | 2011 year |
| Coupe type: | Hatchback | Cabriolet |
| Num. of Doors: | 3 | 2 |
| Num. of seats: | 5 | 4 |
| Fuel consumption / economy - urban: | 4.8 l/100 km | 13.3 l/100 km |
| Fuel consumption / economy - extra urban: | 4.0-4.1 l/100 km | 7.1 l/100 km |
| Fuel consumption / economy - combined: | 4.3-4.4 l/100 km | 9.4 l/100 km |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | 0.34 |
| Fuel tank volume: | 56 l | 53 l |
| Emission standard: | Euro 5 | Euro 4 |
| CO2 emissions: | 114-116 g/km | 224 g/km |
| Power: | 110 hp | 306 hp |
| Max power in: | 4000 rpm. | 5800 rpm. |
| Maximum speed: | 182 km/h | 250 km/h |
| Acceleration from 0 to 100 km/h: | 11.9 sec | 5.6 sec |
| Torque: | 280 Nm @ 1750-2500 rpm. | 400 Nm @ 1300-5000 rpm. |
| Model Engine: | A17DTC/A17DTE | N54B30 |
| Engine position: | Front, transverse | Front, longitudinal |
| Engine displacement: | 1686 cm3 | 2979 cm3 |
| Engine oil capacity: | 6.5 l | |
| Coolant: | 8.2 l | |
| Fuel System: | Diesel Commonrail | Multi-point injection |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | Turbocharger |
| Position of cylinders: | Inline | Inline |
| Valvetrain: | - | |
| Number of cylinders: | 4 | 6 |
| Number of valves per cylinder: | 4 | 4 |
| Compression ratio: | 18 | 10.2 |
| Piston Stroke: | 86 mm | 89.6 mm |
| Cylinder Bore: | 79 mm | 84 mm |
| Wheel Drive: | Front wheel drive | Rear wheel drive |
| Number of Gears (manual transmission): | 6 | 6 |
| Length: | 4466 mm | 4360 mm |
| Width: | 1840 mm | 1748 mm |
| Width including mirrors: | 2020 mm | |
| Height: | 1482 mm | 1411 mm |
| Wheelbase: | 2695 mm | 2660 mm |
| Front track: | 1584 mm | 1474 mm |
| Rear (Back) track: | 1588 mm | 1507 mm |
| Ride height(clearance): | 112 mm | 140 mm |
| Minimum volume of Luggage (trunk): | 380 l | 260 l |
| Maximum amount of Luggage (trunk): | 1165 l | 305 l |
| Front suspension: | Double wishbone | |
| Rear suspension: | Multi-link independent | |
| Max weight: | 1890 kg | 2040 kg |
| Front brakes: | Ventilated discs | Ventilated discs |
| Rear brakes: | Disc | Ventilated discs |
| Kerb Weight: | 1430 kg | 1600 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 | 10.7 m |
| Tire size: | 235/55 R17 | 205/50 R17 89 W; 225/45 R17 91 W |
| Wheel rims size: | R17 | 7J x 17; 7.5J x 17 |