2003 Alpina Roadster vs. 2007 BMW 325
To start off, 2007 BMW 325 is newer by 4 year(s). Which means there will be less support and parts availability for 2003 Alpina Roadster. In addition, the cost of maintenance, including insurance, on 2003 Alpina Roadster would be higher. At 3,346 cc (6 cylinders), 2003 Alpina Roadster is equipped with a bigger engine. In terms of performance, 2003 Alpina Roadster (301 HP @ 6300 RPM) has 85 more horse power than 2007 BMW 325. (216 HP @ 6500 RPM). In normal driving conditions, 2003 Alpina Roadster should accelerate faster than 2007 BMW 325. With that said, vehicle weight also plays an important factor in acceleration. 2003 Alpina Roadster weights approximately 11 kg more than 2007 BMW 325. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 BMW 325 is four wheel drive (4WD), it will have significant more traction and grip than 2003 Alpina Roadster. In wet, icy, snow, or gravel driving conditions, 2007 BMW 325 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, 2003 Alpina Roadster (362 Nm @ 4800 RPM) has 112 more torque (in Nm) than 2007 BMW 325. (250 Nm @ 2750 RPM). This means 2003 Alpina Roadster will have an easier job in driving up hills or pulling heavy equipment than 2007 BMW 325.
Compare all specifications:
| 2003 Alpina Roadster | 2007 BMW 325 | |
| Make | Alpina | BMW |
| Model | Roadster | 325 |
| Year Released | 2003 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3346 cc | 2497 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 301 HP | 216 HP |
| Engine RPM | 6300 RPM | 6500 RPM |
| Torque | 362 Nm | 250 Nm |
| Torque RPM | 4800 RPM | 2750 RPM |
| Engine Bore Size | 87 mm | 82 mm |
| Engine Stroke Size | 93.8 mm | 78.8 mm |
| Engine Compression Ratio | 10.0:1 | 11.0:1 |
| Fuel Type | Gasoline - Premium | Gasoline - Premium |
| Acceleration 0-100mph | 5.4 seconds | 7.5 seconds |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1626 kg | 1615 kg |
| Vehicle Length | 4100 mm | 4480 mm |
| Vehicle Width | 1790 mm | 1820 mm |
| Vehicle Height | 1310 mm | 1430 mm |
| Wheelbase Size | 2500 mm | 2770 mm |
| Fuel Consumption Overall | 11.7 L/100km | 9.2 L/100km |
| Fuel Tank Capacity | 55 L | 63 L |
