2003 BMW 645 vs. 2011 GMC Sierra
To start off, 2011 GMC Sierra is newer by 8 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 6,200 cc (8 cylinders), 2011 GMC Sierra is equipped with a bigger engine. In terms of performance, 2011 GMC Sierra (403 HP @ 5700 RPM) has 93 more horse power than 2003 BMW 645. (310 HP @ 6000 RPM) In normal driving conditions, 2011 GMC Sierra should accelerate faster than 2003 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2011 GMC Sierra weights approximately 654 kg more than 2003 BMW 645. 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, 2011 GMC Sierra (565 Nm @ 4300 RPM) has 115 more torque (in Nm) than 2003 BMW 645. (450 Nm @ 3600 RPM). This means 2011 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 645.
Compare all specifications:
| 2003 BMW 645 | 2011 GMC Sierra | |
| Make | BMW | GMC |
| Model | 645 | Sierra |
| Year Released | 2003 | 2011 |
| Body Type | Coupe | Pickup |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 6200 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 310 HP | 403 HP |
| Engine RPM | 6000 RPM | 5700 RPM |
| Torque | 450 Nm | 565 Nm |
| Torque RPM | 3600 RPM | 4300 RPM |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | 6-speed shiftable automatic |
| Vehicle Weight | 1698 kg | 2352 kg |
| Vehicle Length | 4830 mm | 5839 mm |
| Vehicle Width | 1860 mm | 2032 mm |
| Vehicle Height | 1380 mm | 1875 mm |
| Wheelbase Size | 2790 mm | 3645 mm |
| Fuel Consumption | 8 L/100km | 13.1 L/100km |
| Fuel Consumption City | 16.1 L/100km | 18.1 L/100km |
| Fuel Tank Capacity | 70 L | 98 L |
