2003 Alpina B3 vs. 1972 McLaren M21
To start off, 2003 Alpina B3 is newer by 31 year(s). Which means there will be less support and parts availability for 1972 McLaren M21. In addition, the cost of maintenance, including insurance, on 1972 McLaren M21 would be higher. At 3,346 cc (6 cylinders), 2003 Alpina B3 is equipped with a bigger engine. In terms of performance, 2003 Alpina B3 (302 HP @ 6300 RPM) has 35 more horse power than 1972 McLaren M21. (267 HP @ 10000 RPM). In normal driving conditions, 2003 Alpina B3 should accelerate faster than 1972 McLaren M21. With that said, vehicle weight also plays an important factor in acceleration. 2003 Alpina B3 weights approximately 1015 kg more than 1972 McLaren M21. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Compare all specifications:
| 2003 Alpina B3 | 1972 McLaren M21 | |
| Make | Alpina | McLaren |
| Model | B3 | M21 |
| Year Released | 2003 | 1972 |
| Engine Size | 3346 cc | 1897 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 302 HP | 267 HP |
| Engine RPM | 6300 RPM | 10000 RPM |
| Fuel Type | Gasoline | Gasoline |
| Vehicle Weight | 1480 kg | 465 kg |
