2006 BMW 645 vs. 2005 Buick Rainier
To start off, 2006 BMW 645 is newer by 1 year(s). Which means there will be less support and parts availability for 2005 Buick Rainier. In addition, the cost of maintenance, including insurance, on 2005 Buick Rainier would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 52 more horse power than 2005 Buick Rainier. (276 HP @ 5200 RPM). In normal driving conditions, 2006 BMW 645 should accelerate faster than 2005 Buick Rainier. With that said, vehicle weight also plays an important factor in acceleration. 2005 Buick Rainier weights approximately 194 kg more than 2006 BMW 645.
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, 2006 BMW 645 (450 Nm) has 63 more torque (in Nm) than 2005 Buick Rainier. (387 Nm). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2005 Buick Rainier.
Compare all specifications:
| 2006 BMW 645 | 2005 Buick Rainier | |
| Make | BMW | Buick |
| Model | 645 | Rainier |
| Year Released | 2006 | 2005 |
| Body Type | Coupe | SUV |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 328 HP | 276 HP |
| Engine RPM | 6100 RPM | 5200 RPM |
| Torque | 450 Nm | 387 Nm |
| Engine Bore Size | 92 mm | 93 mm |
| Engine Stroke Size | 83 mm | 102 mm |
| Drive Type | Rear | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1810 kg | 2004 kg |
| Vehicle Length | 4830 mm | 4920 mm |
| Vehicle Width | 1860 mm | 1920 mm |
| Vehicle Height | 1380 mm | 1900 mm |
| Wheelbase Size | 2790 mm | 2900 mm |
| Fuel Consumption Overall | 11.9 L/100km | 13.1 L/100km |
| Fuel Tank Capacity | 70 L | 83 L |
