2009 Porsche Cayman vs. 2013 BMW 6 series
To start off, 2013 BMW 6 series is newer by 4 year(s). Which means there will be less support and parts availability for 2009 Porsche Cayman. In addition, the cost of maintenance, including insurance, on 2009 Porsche Cayman would be higher. At 4,395 cc (8 cylinders), 2013 BMW 6 series is equipped with a bigger engine. In terms of performance, 2013 BMW 6 series (437 HP @ 5500 RPM) has 146 more horse power than 2009 Porsche Cayman. (291 HP @ 6250 RPM) In normal driving conditions, 2013 BMW 6 series should accelerate faster than 2009 Porsche Cayman. With that said, vehicle weight also plays an important factor in acceleration. 2013 BMW 6 series weights approximately 559 kg more than 2009 Porsche Cayman. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2013 BMW 6 series is all wheel drive (AWD), it will have significant more traction and grip than 2009 Porsche Cayman. In wet, icy, snow, or gravel driving conditions, 2013 BMW 6 series will offer significantly more control. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2013 BMW 6 series (649 Nm @ 4500 RPM) has 309 more torque (in Nm) than 2009 Porsche Cayman. (340 Nm @ 4600 RPM). This means 2013 BMW 6 series will have an easier job in driving up hills or pulling heavy equipment than 2009 Porsche Cayman.
Compare all specifications:
| 2009 Porsche Cayman | 2013 BMW 6 series | |
| Make | Porsche | BMW |
| Model | Cayman | 6 series |
| Year Released | 2009 | 2013 |
| Body Type | Coupe | Coupe |
| Engine Position | Middle | Front |
| Engine Size | 3385 cc | 4395 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 291 HP | 437 HP |
| Engine RPM | 6250 RPM | 5500 RPM |
| Torque | 340 Nm | 649 Nm |
| Torque RPM | 4600 RPM | 4500 RPM |
| Engine Bore Size | 96.3 mm | 89 mm |
| Engine Stroke Size | 78.3 mm | 88 mm |
| Engine Compression Ratio | 11.1:1 | 10.0 :1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 267 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.1 seconds | 4.5 seconds |
| Drive Type | Rear | AWD |
| Transmission Type | Automatic | 8-speed automatic |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1530 kg | 2089 kg |
| Vehicle Length | 4350 mm | 5009 mm |
| Vehicle Width | 1310 mm | 2081 mm |
| Vehicle Height | 1810 mm | 1392 mm |
| Wheelbase Size | 2420 mm | 2968 mm |
| Fuel Tank Capacity | 64 L | 70 L |
