2002 Alfa Romeo 156 vs. 2006 BMW 645
To start off, 2006 BMW 645 is newer by 4 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 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2006 BMW 645 (328 HP @ 6100 RPM) has 208 more horse power than 2002 Alfa Romeo 156. (120 HP @ 6200 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 2002 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 580 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 2006 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 2006 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, 2006 BMW 645 (450 Nm @ 3600 RPM) has 303 more torque (in Nm) than 2002 Alfa Romeo 156. (147 Nm @ 4500 RPM). This means 2006 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 | 2006 BMW 645 | |
| Make | Alfa Romeo | BMW |
| Model | 156 | 645 |
| Year Released | 2002 | 2006 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 1598 cc | 4398 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 120 HP | 328 HP |
| Engine RPM | 6200 RPM | 6100 RPM |
| Torque | 147 Nm | 450 Nm |
| Torque RPM | 4500 RPM | 3600 RPM |
| Engine Bore Size | 82 mm | 92 mm |
| Engine Stroke Size | 75.6 mm | 83 mm |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 200 km/hour | 250 km/hour |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1230 kg | 1810 kg |
| Vehicle Length | 4440 mm | 4830 mm |
| Vehicle Width | 1750 mm | 1860 mm |
| Vehicle Height | 1400 mm | 1380 mm |
| Wheelbase Size | 2710 mm | 2790 mm |
| Fuel Consumption Overall | 8.2 L/100km | 11.9 L/100km |
| Fuel Tank Capacity | 63 L | 70 L |
