Comparison Porsche 911 Cabriolet (997, facelift 2008) Carrera 4 GTS 3.8 (408 Hp) PDK & Opel Astra K Sports Tourer 1.6 CDTi (95 Hp) & Pontiac G6 3.4 i V6 12V GT (204 Hp)
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| Brand: | Porsche | Opel | Pontiac |
| Model: | 911 | Astra | G6 |
| Generation: | 911 Cabriolet (997, facelift 2008) | Astra K Sports Tourer | G6 |
| Engine / modification: | Carrera 4 GTS 3.8 (408 Hp) PDK | 1.6 CDTi (95 Hp) | 3.4 i V6 12V GT (204 Hp) |
| Production start: | 2010 year | 2015 year | 2005 year |
| Production end: | 2011 year | ||
| Coupe type: | Cabriolet | Combi | Sedan |
| Num. of Doors: | 2 | 5 | 4 |
| Num. of seats: | 4 | 5 | 5 |
| Fuel consumption / economy - urban: | 16.1 l/100 km | 4.2 - 4.4 l/100 km | 11.2 l/100 km |
| Fuel consumption / economy - extra urban: | 7.7 l/100 km | 3.3 - 3.4 l/100 km | 8.1 l/100 km |
| Fuel consumption / economy - combined: | 10.7 l/100 km | 3.6 - 3.8 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Diesel | Petrol (Gasoline) |
| Drag coefficient: | 0.31 | ||
| Fuel tank volume: | 67 l | 48 l | 64 l |
| Emission standard: | Euro 5 | EURO VI | |
| CO2 emissions: | 251 g/km | 99 - 96 g/km | |
| Power: | 408 hp | 95 hp | 204 hp |
| Max power in: | 7300 rpm. | 3500 rpm. | 5800 rpm. |
| Maximum speed: | 300 km/h | 185 km/h | 197 km/h |
| Acceleration from 0 to 100 km/h: | 4.4-4.6 sec | 12.9 sec | 8 sec |
| Torque: | 420 Nm @ 4200 rpm. | 280 Nm/1500-1750 rpm. | 300 Nm/3800 rpm. |
| Model Engine: | MA1.01S | ||
| Engine position: | Rear, longitudinal | Front, transverse | Front, transverse |
| Engine displacement: | 3800 cm3 | 1598 cm3 | 3498 cm3 |
| Engine oil capacity: | 7.5 l | ||
| Coolant: | 29-32 l | ||
| Fuel System: | Direct injection | Diesel Commonrail | Multi-point injection |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | ||
| Position of cylinders: | Boxer | Inline | V engine |
| Number of cylinders: | 6 | 4 | 6 |
| Number of valves per cylinder: | 2 | ||
| Compression ratio: | 12.5 | 16 | 9.8 |
| Piston Stroke: | 80.1 mm | 84 mm | |
| Cylinder Bore: | 79.7 mm | 94 mm | |
| Wheel Drive: | All wheel drive (4x4) | Front wheel drive | Front wheel drive |
| Number of Gears (automatic transmission): | 7 PDK | 4 | |
| Number of Gears (manual transmission): | 6 | ||
| Length: | 4435 mm | 4702 mm | 4802 mm |
| Width: | 1852 mm | 1809 mm | 1749 mm |
| Width with mirrors folded: | 1871 mm | ||
| Width including mirrors: | 2042 mm | ||
| Height: | 1300 mm | 1499 mm | 1450 mm |
| Wheelbase: | 2350 mm | 2662 mm | 2852 mm |
| Front track: | 1548 mm | 1519 mm | |
| Rear (Back) track: | 1565 mm | 1534 mm | |
| Minimum volume of Luggage (trunk): | 540 l | 397 l | |
| Maximum amount of Luggage (trunk): | 105 l | 1630 l | |
| Front suspension: | McPherson | The depreciated rack | |
| Rear suspension: | Multi-link independent | The depreciated rack | |
| Max weight: | 1970 kg | 1925 kg | |
| Front brakes: | Disc | Disc | |
| Rear brakes: | Disc | Disc | |
| Kerb Weight: | 1595 kg | 1313 kg | 1560 kg |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | ||
| Max. roof load: | 75 kg | ||
| Minimum turning circle (turning diameter): | 10.9 m | 11.05 m | |
| Permitted trailer load with brakes (12%): | 1403 kg | ||
| Permitted trailer load without brakes: | 670 kg | ||
| Tire size: | 235/35 ZR19; 305/30 ZR19 | 195/65 R15; 205/55 R16 | 225/50 R17 |
| Wheel rims size: | 8.5J x 19; 11J x 19 | 6J x 15; 6.5J x 16 |