2005 BMW 645 vs. 2008 Porsche 911
To start off, 2008 Porsche 911 is newer by 3 year(s). Which means there will be less support and parts availability for 2005 BMW 645. In addition, the cost of maintenance, including insurance, on 2005 BMW 645 would be higher. At 4,392 cc (8 cylinders), 2005 BMW 645 is equipped with a bigger engine.
Because 2008 Porsche 911 is four wheel drive (4WD), it will have significant more traction and grip than 2005 BMW 645. In wet, icy, snow, or gravel driving conditions, 2008 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, 2005 BMW 645 (447 Nm @ 3600 RPM) has 77 more torque (in Nm) than 2008 Porsche 911. (370 Nm @ 4250 RPM). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2008 Porsche 911. 2008 Porsche 911 has automatic transmission and 2005 BMW 645 has manual transmission. 2005 BMW 645 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Porsche 911 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 BMW 645 | 2008 Porsche 911 | |
| Make | BMW | Porsche |
| Model | 645 | 911 |
| Year Released | 2005 | 2008 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Rear |
| Engine Size | 4392 cc | 3595 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | boxer |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 326 HP | 0 HP |
| Torque | 447 Nm | 370 Nm |
| Torque RPM | 3600 RPM | 4250 RPM |
| Engine Bore Size | 92 mm | 96 mm |
| Engine Stroke Size | 83 mm | 82.8 mm |
| Engine Compression Ratio | 10.5:1 | 11.3:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 250 km/hour | 280 km/hour |
| Acceleration 0-100mph | 6.1 seconds | 5.3 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Length | 4830 mm | 4790 mm |
| Vehicle Height | 1380 mm | 1710 mm |
| Wheelbase Size | 2890 mm | 2360 mm |
| Fuel Consumption Overall | 12.8 L/100km | 8.4 L/100km |
| Fuel Tank Capacity | 70 L | 67 L |
