2004 Alfa Romeo 156 vs. 1972 McLaren M21
To start off, 2004 Alfa Romeo 156 is newer by 32 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 1,910 cc (4 cylinders), 2004 Alfa Romeo 156 is equipped with a bigger engine. In terms of performance, 1972 McLaren M21 (267 HP @ 10000 RPM) has 119 more horse power than 2004 Alfa Romeo 156. (148 HP @ 4000 RPM) In normal driving conditions, 1972 McLaren M21 should accelerate faster than 2004 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2004 Alfa Romeo 156 weights approximately 1060 kg more than 1972 McLaren M21.
Compare all specifications:
| 2004 Alfa Romeo 156 | 1972 McLaren M21 | |
| Make | Alfa Romeo | McLaren |
| Model | 156 | M21 |
| Year Released | 2004 | 1972 |
| Engine Size | 1910 cc | 1897 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 148 HP | 267 HP |
| Engine RPM | 4000 RPM | 10000 RPM |
| Fuel Type | Diesel | Gasoline |
| Vehicle Weight | 1525 kg | 465 kg |
