2007 Porsche 911 vs. 2008 BMW 645
To start off, 2008 BMW 645 is newer by 1 year(s). Which means there will be less support and parts availability for 2007 Porsche 911. In addition, the cost of maintenance, including insurance, on 2007 Porsche 911 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 12 more horse power than 2007 Porsche 911. (316 HP @ 4250 RPM) In normal driving conditions, 2008 BMW 645 should accelerate faster than 2007 Porsche 911. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW 645 weights approximately 205 kg more than 2007 Porsche 911. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 Porsche 911 is four wheel drive (4WD), it will have significant more traction and grip than 2008 BMW 645. In wet, icy, snow, or gravel driving conditions, 2007 Porsche 911 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, 2008 BMW 645 (450 Nm @ 3600 RPM) has 80 more torque (in Nm) than 2007 Porsche 911. (370 Nm @ 4250 RPM). This means 2008 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 Porsche 911.
Compare all specifications:
| 2007 Porsche 911 | 2008 BMW 645 | |
| Make | Porsche | BMW |
| Model | 911 | 645 |
| Year Released | 2007 | 2008 |
| Body Type | Convertible | Coupe |
| Engine Position | Rear | Front |
| Engine Size | 3595 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | boxer | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 316 HP | 328 HP |
| Engine RPM | 4250 RPM | 6100 RPM |
| Torque | 370 Nm | 450 Nm |
| Torque RPM | 4250 RPM | 3600 RPM |
| Engine Bore Size | 96 mm | 92.1 mm |
| Engine Stroke Size | 82.8 mm | 82.7 mm |
| Engine Compression Ratio | 11.3:1 | 10.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Acceleration 0-100mph | 5.2 seconds | 5.6 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1485 kg | 1690 kg |
| Vehicle Length | 4440 mm | 4830 mm |
| Vehicle Width | 1780 mm | 1860 mm |
| Vehicle Height | 1310 mm | 1380 mm |
| Wheelbase Size | 2360 mm | 2790 mm |
| Fuel Consumption Overall | 11.2 L/100km | 11.8 L/100km |
| Fuel Tank Capacity | 64 L | 70 L |
