2009 Porsche Cayman vs. 2008 BMW 645
To start off, 2009 Porsche Cayman is newer by 1 year(s). Which means there will be less support and parts availability for 2008 BMW 645. In addition, the cost of maintenance, including insurance, on 2008 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2008 BMW 645 is equipped with a bigger engine. In terms of performance, 2008 BMW 645 (328 HP @ 6100 RPM) has 86 more horse power than 2009 Porsche Cayman. (242 HP @ 6500 RPM) In normal driving conditions, 2008 BMW 645 should accelerate faster than 2009 Porsche Cayman. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW 645 weights approximately 285 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.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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, 2008 BMW 645 (450 Nm @ 3600 RPM) has 177 more torque (in Nm) than 2009 Porsche Cayman. (273 Nm @ 4600 RPM). This means 2008 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2009 Porsche Cayman. 2008 BMW 645 has automatic transmission and 2009 Porsche Cayman has manual transmission. 2009 Porsche Cayman will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Porsche Cayman | 2008 BMW 645 | |
| Make | Porsche | BMW |
| Model | Cayman | 645 |
| Year Released | 2009 | 2008 |
| Body Type | Coupe | Convertible |
| Engine Position | Middle | Front |
| Engine Size | 2687 cc | 4398 cc |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 242 HP | 328 HP |
| Engine RPM | 6500 RPM | 6100 RPM |
| Torque | 273 Nm | 450 Nm |
| Torque RPM | 4600 RPM | 3600 RPM |
| Engine Bore Size | 85.5 mm | 92 mm |
| Engine Stroke Size | 78 mm | 82.7 mm |
| Engine Compression Ratio | 11.3:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Top Speed | 258 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.1 seconds | 6.4 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1530 kg | 1815 kg |
| Vehicle Length | 4350 mm | 4830 mm |
| Vehicle Width | 1310 mm | 1860 mm |
| Vehicle Height | 1810 mm | 1380 mm |
| Wheelbase Size | 2420 mm | 2790 mm |
| Fuel Consumption Overall | 9.5 L/100km | 12.8 L/100km |
| Fuel Tank Capacity | 64 L | 70 L |
