2008 Alfa Romeo 159 vs. 2006 BMW 645
To start off, 2008 Alfa Romeo 159 is newer by 2 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 72 more horse power than 2008 Alfa Romeo 159. (256 HP @ 6200 RPM) In normal driving conditions, 2006 BMW 645 should accelerate faster than 2008 Alfa Romeo 159. With that said, vehicle weight also plays an important factor in acceleration. 2006 BMW 645 weights approximately 31 kg more than 2008 Alfa Romeo 159. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2008 Alfa Romeo 159 is four wheel drive (4WD), it will have significant more traction and grip than 2006 BMW 645. In wet, icy, snow, or gravel driving conditions, 2008 Alfa Romeo 159 will offer significantly more control. 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 128 more torque (in Nm) than 2008 Alfa Romeo 159. (322 Nm @ 4500 RPM). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2008 Alfa Romeo 159.
Compare all specifications:
| 2008 Alfa Romeo 159 | 2006 BMW 645 | |
| Make | Alfa Romeo | BMW |
| Model | 159 | 645 |
| Year Released | 2008 | 2006 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3195 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 256 HP | 328 HP |
| Engine RPM | 6200 RPM | 6100 RPM |
| Torque | 322 Nm | 450 Nm |
| Torque RPM | 4500 RPM | 3600 RPM |
| Engine Compression Ratio | 11.3:1 | 10.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Top Speed | 237 km/hour | 250 km/hour |
| Acceleration 0-100mph | 7.5 seconds | 6.1 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1805 kg | 1836 kg |
| Vehicle Length | 4670 mm | 4830 mm |
| Vehicle Width | 1840 mm | 1860 mm |
| Vehicle Height | 1460 mm | 1380 mm |
| Wheelbase Size | 2710 mm | 2790 mm |
| Fuel Consumption Overall | 11.6 L/100km | 12.8 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
