2003 BMW 645 vs. 2004 Buick Regal
To start off, 2004 Buick Regal is newer by 1 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 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2003 BMW 645 (325 HP @ 6100 RPM) has 128 more horse power than 2004 Buick Regal. (197 HP @ 5200 RPM). In normal driving conditions, 2003 BMW 645 should accelerate faster than 2004 Buick Regal. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 169 kg more than 2004 Buick Regal. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 BMW 645 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2003 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 2004 Buick Regal, being front wheel drive (FWD), will offer much better control with better grip. 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, 2003 BMW 645 (450 Nm @ 3600 RPM) has 138 more torque (in Nm) than 2004 Buick Regal. (312 Nm @ 4000 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2004 Buick Regal. 2004 Buick Regal has automatic transmission and 2003 BMW 645 has manual transmission. 2003 BMW 645 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2004 Buick Regal will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2003 BMW 645 | 2004 Buick Regal | |
| Make | BMW | Buick |
| Model | 645 | Regal |
| Year Released | 2003 | 2004 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 3791 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 325 HP | 197 HP |
| Engine RPM | 6100 RPM | 5200 RPM |
| Torque | 450 Nm | 312 Nm |
| Torque RPM | 3600 RPM | 4000 RPM |
| Engine Bore Size | 92 mm | 97 mm |
| Engine Stroke Size | 82.7 mm | 86 mm |
| Engine Compression Ratio | 10.5:1 | 9.4:1 |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1690 kg | 1521 kg |
| Vehicle Length | 4830 mm | 4990 mm |
| Vehicle Width | 1860 mm | 1850 mm |
| Vehicle Height | 1380 mm | 1440 mm |
| Wheelbase Size | 2890 mm | 3080 mm |
| Fuel Consumption City | 17.2 L/100km | 11.9 L/100km |
| Fuel Consumption Overall | 11.7 L/100km | 10 L/100km |
| Fuel Tank Capacity | 70 L | 66 L |
