2007 Alfa Romeo 159 vs. 2003 BMW 645
To start off, 2007 Alfa Romeo 159 is newer by 4 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 (310 HP @ 6000 RPM) has 112 more horse power than 2007 Alfa Romeo 159. (198 HP @ 4000 RPM) In normal driving conditions, 2003 BMW 645 should accelerate faster than 2007 Alfa Romeo 159. With that said, vehicle weight also plays an important factor in acceleration. 2007 Alfa Romeo 159 weights approximately 7 kg more than 2003 BMW 645.
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, 2007 Alfa Romeo 159, 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 50 more torque (in Nm) than 2007 Alfa Romeo 159. (400 Nm @ 2000 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 Alfa Romeo 159. 2003 BMW 645 has automatic transmission and 2007 Alfa Romeo 159 has manual transmission. 2007 Alfa Romeo 159 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 Alfa Romeo 159 | 2003 BMW 645 | |
| Make | Alfa Romeo | BMW |
| Model | 159 | 645 |
| Year Released | 2007 | 2003 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 2387 cc | 4398 cc |
| Engine Cylinders | 5 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 198 HP | 310 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 400 Nm | 450 Nm |
| Torque RPM | 2000 RPM | 3600 RPM |
| Engine Bore Size | 82 mm | 92 mm |
| Engine Stroke Size | 90.4 mm | 82.7 mm |
| Engine Compression Ratio | 17.0:1 | 10.5:1 |
| Top Speed | 228 km/hour | 250 km/hour |
| Acceleration 0-100mph | 8.4 seconds | 5.9 seconds |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1705 kg | 1698 kg |
| Vehicle Length | 4670 mm | 4830 mm |
| Vehicle Width | 1830 mm | 1860 mm |
| Vehicle Height | 1420 mm | 1380 mm |
| Wheelbase Size | 2710 mm | 2790 mm |
| Fuel Consumption | 5.4 L/100km | 8 L/100km |
| Fuel Consumption Overall | 6.8 L/100km | 10.9 L/100km |
| Fuel Tank Capacity | 70 L | 70 L |
