Comparison Porsche 911 (997, facelift 2008) Carrera 3.6 (345 Hp) PDK & Porsche 911 Targa (997) Targa 4 3.6 (325 Hp) Tiptronic S & Opel Astra J Sedan 2.0 CDTI (165 Hp) Ecotec Automatic
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| Brand: | Porsche | Porsche | Opel |
| Model: | 911 | 911 | Astra |
| Generation: | 911 (997, facelift 2008) | 911 Targa (997) | Astra J Sedan |
| Engine / modification: | Carrera 3.6 (345 Hp) PDK | Targa 4 3.6 (325 Hp) Tiptronic S | 2.0 CDTI (165 Hp) Ecotec Automatic |
| Production start: | 2008 year | 2006 year | 2012 year |
| Production end: | 2012 year | 2008 year | 2015 year |
| Coupe type: | Coupe | Targa | Sedan |
| Num. of Doors: | 2 | 2 | 4 |
| Num. of seats: | 4 | 4 | 5 |
| Fuel consumption / economy - urban: | 14.7 l/100 km | 17.4 l/100 km | |
| Fuel consumption / economy - extra urban: | 7 l/100 km | 8.6 l/100 km | |
| Fuel consumption / economy - combined: | 9.8 l/100 km | 11.6 l/100 km | 5.8 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Diesel |
| Drag coefficient: | 0.29 | 0.30 | |
| Fuel tank volume: | 64 l | 67 l | 56 l |
| Emission standard: | Euro 5 | Euro 5 | |
| CO2 emissions: | 280 g/km | 154 g/km | |
| Power: | 345 hp | 325 hp | 165 hp |
| Max power in: | 6500 rpm. | 6800 rpm. | 4000 rpm. |
| Maximum speed: | 287 km/h | 275 km/h | 209 km/h |
| Acceleration from 0 to 100 km/h: | 4.7 sec | 5.8 sec | 9.2 sec |
| Torque: | 390 Nm @ 4400 rpm. | 370 Nm @ 4250 rpm. | 350 Nm @ 1750-2500 rpm. |
| Model Engine: | MA1.02 | M 96/05 | A20DTH |
| Engine position: | Rear, longitudinal | Rear, longitudinal | Front, transverse |
| Engine displacement: | 3614 cm3 | 3596 cm3 | 1956 cm3 |
| Engine oil capacity: | 7.5 l | 8.25 l | |
| Coolant: | 29-32 l | 32 l | |
| Fuel System: | Direct injection | Multi-point injection | Diesel Commonrail |
| Aspiration / Turbine: | Turbo / Intercooler (Turbocharging / Intercooler) | ||
| Position of cylinders: | Boxer | Boxer | Inline |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 6 | 6 | 4 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 12.5 | 11.3 | |
| Piston Stroke: | 81.5 mm | 90.4 mm | |
| Cylinder Bore: | 97 mm | 83 mm | |
| Wheel Drive: | Rear wheel drive | All wheel drive (4x4) | Front wheel drive |
| Number of Gears (automatic transmission): | 7 PDK | 5 Tiptronic S | 6 |
| Length: | 4435 mm | 4427 mm | 4658 mm |
| Width: | 1808 mm | 1852 mm | 1814 mm |
| Width including mirrors: | 2013 mm | ||
| Height: | 1310 mm | 1310 mm | 1500 mm |
| Wheelbase: | 2350 mm | 2350 mm | 2685 mm |
| Front track: | 1488 mm | 1541 mm | |
| Rear (Back) track: | 1548 mm | 1551 mm | |
| Front overhang: | 974 mm | ||
| Rear overhang: | 999 mm | ||
| Minimum volume of Luggage (trunk): | 135 l | 460 l | |
| Maximum amount of Luggage (trunk): | 135 l | 105 l | 1010 l |
| Front suspension: | McPherson | McPherson | |
| Rear suspension: | Multi-link independent | Multi-link independent | |
| Max weight: | 1850 kg | 1945 kg | |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs | |
| Kerb Weight: | 1445 kg | 1550 kg | |
| ABS: | yes | yes | yes |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering | Electric Steering |
| Minimum turning circle (turning diameter): | 10.9 m | 10.9 m | 11.5 m |
| Tire size: | 235/40 R18ZR; 265/40 R18ZR | 235/40 ZR18; 295/35 ZR18 | |
| Wheel rims size: | 8J x 18; 10.5J x 18 | 8J x 18; 11J x 18 |