2006 BMW 645 vs. 2007 Buick Rainier
To start off, 2007 Buick Rainier is newer by 1 year(s). Which means there will be less support and parts availability for 2006 BMW 645. In addition, the cost of maintenance, including insurance, on 2006 BMW 645 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 37 more horse power than 2007 Buick Rainier. (291 HP @ 6000 RPM). In normal driving conditions, 2006 BMW 645 should accelerate faster than 2007 Buick Rainier.
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 @ 3600 RPM) has 74 more torque (in Nm) than 2007 Buick Rainier. (376 Nm @ 4800 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 Buick Rainier. 2007 Buick Rainier has automatic transmission and 2006 BMW 645 has manual transmission. 2006 BMW 645 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 Buick Rainier will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 BMW 645 | 2007 Buick Rainier | |
| Make | BMW | Buick |
| Model | 645 | Rainier |
| Year Released | 2006 | 2007 |
| Body Type | Convertible | SUV |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4163 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 328 HP | 291 HP |
| Engine RPM | 6100 RPM | 6000 RPM |
| Torque | 450 Nm | 376 Nm |
| Torque RPM | 3600 RPM | 4800 RPM |
| Engine Bore Size | 92 mm | 93.1 mm |
| Engine Stroke Size | 83 mm | 101.9 mm |
| Engine Compression Ratio | 10.0:1 | 10.3:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Length | 4830 mm | 4920 mm |
| Vehicle Width | 1860 mm | 1920 mm |
| Vehicle Height | 1380 mm | 1900 mm |
| Wheelbase Size | 2790 mm | 2880 mm |
| Fuel Tank Capacity | 70 L | 83 L |
