2003 Alpina B3 vs. 2007 Cadillac STS
To start off, 2007 Cadillac STS is newer by 4 year(s). Which means there will be less support and parts availability for 2003 Alpina B3. In addition, the cost of maintenance, including insurance, on 2003 Alpina B3 would be higher. At 4,565 cc (8 cylinders), 2007 Cadillac STS is equipped with a bigger engine. In terms of performance, 2007 Cadillac STS (320 HP @ 6400 RPM) has 19 more horse power than 2003 Alpina B3. (301 HP @ 6200 RPM) In normal driving conditions, 2007 Cadillac STS should accelerate faster than 2003 Alpina B3. With that said, vehicle weight also plays an important factor in acceleration. 2003 Alpina B3 weights approximately 79 kg more than 2007 Cadillac STS.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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, 2007 Cadillac STS (427 Nm @ 4400 RPM) has 65 more torque (in Nm) than 2003 Alpina B3. (362 Nm @ 4800 RPM). This means 2007 Cadillac STS will have an easier job in driving up hills or pulling heavy equipment than 2003 Alpina B3.
Compare all specifications:
| 2003 Alpina B3 | 2007 Cadillac STS | |
| Make | Alpina | Cadillac |
| Model | B3 | STS |
| Year Released | 2003 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3344 cc | 4565 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 301 HP | 320 HP |
| Engine RPM | 6200 RPM | 6400 RPM |
| Torque | 362 Nm | 427 Nm |
| Torque RPM | 4800 RPM | 4400 RPM |
| Engine Bore Size | 87 mm | 93 mm |
| Engine Stroke Size | 93.8 mm | 84 mm |
| Engine Compression Ratio | 10.0:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1645 kg | 1566 kg |
| Vehicle Length | 4490 mm | 4990 mm |
| Vehicle Width | 1760 mm | 1850 mm |
| Vehicle Height | 1360 mm | 1470 mm |
| Wheelbase Size | 2730 mm | 2960 mm |
| Fuel Tank Capacity | 63 L | 64 L |
