2007 BMW 645 vs. 2005 GMC Sierra
To start off, 2007 BMW 645 is newer by 2 year(s). Which means there will be less support and parts availability for 2005 GMC Sierra. In addition, the cost of maintenance, including insurance, on 2005 GMC Sierra would be higher. At 5,965 cc (8 cylinders), 2005 GMC Sierra is equipped with a bigger engine. In terms of performance, 2007 BMW 645 (328 HP) has 28 more horse power than 2005 GMC Sierra. (300 HP). In normal driving conditions, 2007 BMW 645 should accelerate faster than 2005 GMC Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2005 GMC Sierra weights approximately 1184 kg more than 2007 BMW 645.
Because 2005 GMC Sierra is four wheel drive (4WD), it will have significant more traction and grip than 2007 BMW 645. In wet, icy, snow, or gravel driving conditions, 2005 GMC Sierra 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 GMC Sierra (488 Nm) has 38 more torque (in Nm) than 2007 BMW 645. (450 Nm). This means 2005 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 645.
Compare all specifications:
| 2007 BMW 645 | 2005 GMC Sierra | |
| Make | BMW | GMC |
| Model | 645 | Sierra |
| Year Released | 2007 | 2005 |
| Body Type | Coupe | Pickup |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 5965 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 328 HP | 300 HP |
| Torque | 450 Nm | 488 Nm |
| Engine Compression Ratio | 10.0:1 | 9.4:1 |
| Drive Type | Rear | 4WD |
| Number of Seats | 4 seats | 6 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1690 kg | 2874 kg |
| Vehicle Length | 4830 mm | 6510 mm |
| Vehicle Width | 1860 mm | 2030 mm |
| Vehicle Height | 1380 mm | 1960 mm |
| Wheelbase Size | 2790 mm | 4250 mm |
| Fuel Tank Capacity | 70 L | 129 L |
