Comparison Porsche Cayman (987c, facelift 2009) 2.9 (265 Hp) PDK & BMW 6 Series Convertible (F12) 640i (320 Hp) Steptronic & Porsche Cayenne III 3.0 V6 (340 Hp) Tiptronic S
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| Brand: | Porsche | BMW | Porsche |
| Model: | Cayman | 6 Series | Cayenne |
| Generation: | Cayman (987c, facelift 2009) | 6 Series Convertible (F12) | Cayenne III |
| Engine / modification: | 2.9 (265 Hp) PDK | 640i (320 Hp) Steptronic | 3.0 V6 (340 Hp) Tiptronic S |
| Production start: | 2009 year | 2011 year | 2017 year |
| Production end: | 2012 year | 2015 year | |
| Coupe type: | Coupe | Cabriolet | SUV |
| Num. of Doors: | 2 | 2 | 5 |
| Num. of seats: | 2 | 4 | 5 |
| Fuel consumption / economy - urban: | 13.6 l/100 km | 10.9 l/100 km | 11.1-11.3 l/100 km |
| Fuel consumption / economy - extra urban: | 6.4 l/100 km | 6.2 l/100 km | 7.9-8.0 l/100 km |
| Fuel consumption / economy - combined: | 9.1 l/100 km | 7.9 l/100 km | 9.0-9.2 l/100 km |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.29 | 0.31 | 0.34 |
| Fuel tank volume: | 65 l | 70 l | 75 l |
| Emission standard: | Euro 5 | Euro 5 | Euro 6 |
| CO2 emissions: | 214 g/km | 185 g/km | 205-209 g/km |
| Power: | 265 hp | 320 hp | 340 hp |
| Max power in: | 7200 rpm. | 5800-6000 rpm. | 5300-6400 rpm. |
| Maximum speed: | 263 km/h | 250 km/h | 245 km/h |
| Acceleration from 0 to 100 km/h: | 5.7 sec | 5.7 sec | 6.2 sec |
| Acceleration from 0 to 200 km/h: | 21.8 sec | ||
| Torque: | 300 Nm @ 4400-6000 rpm. | 450 Nm @ 1300-4500 rpm. | 450 Nm @ 1340-5300 rpm. |
| Stopping distance 100 km/h - 0: | 33.4 m | ||
| Model Engine: | MA1.20 | N55B30 | DCBE, M.DCBE |
| Engine position: | Middle, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 2893 cm3 | 2979 cm3 | 2995 cm3 |
| Engine oil capacity: | 7.5 l | 6.5 l | 7.6 l |
| Coolant: | 23 l | 10.2 l | |
| Fuel System: | Direct injection | Direct injection | |
| Maximum engine speed: | 7500 rpm. | ||
| Aspiration / Turbine: | Twin-power turbo | Turbocharger | |
| Position of cylinders: | Boxer | Inline | V engine |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 6 | 6 | 6 |
| Number of valves per cylinder: | 4 | 4 | 4 |
| Compression ratio: | 11.5 | 10.2 | |
| Piston Stroke: | 77.5 mm | 89.6 mm | |
| Cylinder Bore: | 89 mm | 84 mm | |
| Wheel Drive: | Rear wheel drive | Rear wheel drive | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7 | 8 Steptronic | 8 Tiptronic S |
| Length: | 4347 mm | 4894 mm | 4918 mm |
| Width: | 1801 mm | 1894 mm | 1983 mm |
| Width including mirrors: | 1978 mm | ||
| Height: | 1304 mm | 1365 mm | 1696 mm |
| Wheelbase: | 2415 mm | 2855 mm | 2895 mm |
| Front track: | 1490 mm | 1600 mm | |
| Rear (Back) track: | 1534 mm | 1665 mm | |
| Ride height(clearance): | 130 mm | 123 mm | |
| Minimum volume of Luggage (trunk): | 260 l | 300 l | 770 l |
| Maximum amount of Luggage (trunk): | 350 l | 1710 l | |
| Front suspension: | Independent type McPherson | Double wishbone | |
| Rear suspension: | McPherson | Multi-link independent | |
| Max weight: | 1670 kg | 2290 kg | 2830 kg |
| Front brakes: | Ventilated discs | Ventilated discs | |
| Rear brakes: | Ventilated discs | Ventilated discs | |
| Kerb Weight: | 1360 kg | 1840 kg | 1985 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Steering rack and pinion | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Electric Steering | Electric Steering |
| Max. roof load: | 60 kg | ||
| Minimum turning circle (turning diameter): | 11.1 m | 11.7 m | |
| Tire size: | Front wheel tires: 205/55 ZR 17 | 225/55 R17 97Y | |
| Wheel rims size: | Front wheel rims: 7 J x 17 | 8J x 17 |