2002 Alfa Romeo 156 vs. 2005 BMW 645
To start off, 2005 BMW 645 is newer by 3 year(s). Which means there will be less support and parts availability for 2002 Alfa Romeo 156. In addition, the cost of maintenance, including insurance, on 2002 Alfa Romeo 156 would be higher. At 4,392 cc (8 cylinders), 2005 BMW 645 is equipped with a bigger engine. In terms of performance, 2005 BMW 645 (326 HP @ 6100 RPM) has 163 more horse power than 2002 Alfa Romeo 156. (163 HP @ 6400 RPM) In normal driving conditions, 2005 BMW 645 should accelerate faster than 2002 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 645 weights approximately 610 kg more than 2002 Alfa Romeo 156. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 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 2005 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 2002 Alfa Romeo 156, 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, 2005 BMW 645 (447 Nm @ 3600 RPM) has 241 more torque (in Nm) than 2002 Alfa Romeo 156. (206 Nm @ 3250 RPM). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2002 Alfa Romeo 156.
Compare all specifications:
| 2002 Alfa Romeo 156 | 2005 BMW 645 | |
| Make | Alfa Romeo | BMW |
| Model | 156 | 645 |
| Year Released | 2002 | 2005 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 1910 cc | 4392 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 163 HP | 326 HP |
| Engine RPM | 6400 RPM | 6100 RPM |
| Torque | 206 Nm | 447 Nm |
| Torque RPM | 3250 RPM | 3600 RPM |
| Engine Compression Ratio | 11.3:1 | 10.5:1 |
| Top Speed | 215 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8.2 seconds | 6.1 seconds |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1285 kg | 1895 kg |
| Vehicle Length | 4440 mm | 4830 mm |
| Vehicle Width | 1750 mm | 1860 mm |
| Vehicle Height | 1390 mm | 1380 mm |
| Wheelbase Size | 2600 mm | 2890 mm |
| Fuel Tank Capacity | 63 L | 70 L |
