2004 BMW 645 vs. 2007 GMC Sierra
To start off, 2007 GMC Sierra is newer by 3 year(s). Which means there will be less support and parts availability for 2004 BMW 645. In addition, the cost of maintenance, including insurance, on 2004 BMW 645 would be higher. At 5,999 cc (8 cylinders), 2007 GMC Sierra is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (322 HP @ 7400 RPM) has 10 more horse power than 2007 GMC Sierra. (312 HP @ 4400 RPM). In normal driving conditions, 2004 BMW 645 should accelerate faster than 2007 GMC Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2007 GMC Sierra weights approximately 720 kg more than 2004 BMW 645.
Because 2007 GMC Sierra is four wheel drive (4WD), it will have significant more traction and grip than 2004 BMW 645. In wet, icy, snow, or gravel driving conditions, 2007 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, 2007 GMC Sierra (506 Nm) has 59 more torque (in Nm) than 2004 BMW 645. (447 Nm). This means 2007 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 2004 BMW 645.
Compare all specifications:
| 2004 BMW 645 | 2007 GMC Sierra | |
| Make | BMW | GMC |
| Model | 645 | Sierra |
| Year Released | 2004 | 2007 |
| Body Type | Coupe | Pickup |
| Engine Position | Front | Front |
| Engine Size | 4392 cc | 5999 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 322 HP | 312 HP |
| Engine RPM | 7400 RPM | 4400 RPM |
| Torque | 447 Nm | 506 Nm |
| Engine Bore Size | 92 mm | 102 mm |
| Engine Stroke Size | 83 mm | 92 mm |
| Drive Type | Rear | 4WD |
| Number of Seats | 4 seats | 6 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1715 kg | 2435 kg |
| Vehicle Length | 4840 mm | 6580 mm |
| Vehicle Width | 1860 mm | 2440 mm |
| Vehicle Height | 1380 mm | 1940 mm |
| Wheelbase Size | 2790 mm | 4250 mm |
| Fuel Consumption Overall | 11.8 L/100km | 15.8 L/100km |
| Fuel Tank Capacity | 70 L | 129 L |
