2005 Alfa Romeo 156 vs. 1972 McLaren M21
To start off, 2005 Alfa Romeo 156 is newer by 33 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 2,492 cc (6 cylinders), 2005 Alfa Romeo 156 is equipped with a bigger engine. In terms of performance, 1972 McLaren M21 (267 HP @ 10000 RPM) has 82 more horse power than 2005 Alfa Romeo 156. (185 HP @ 5000 RPM) In normal driving conditions, 1972 McLaren M21 should accelerate faster than 2005 Alfa Romeo 156. With that said, vehicle weight also plays an important factor in acceleration. 2005 Alfa Romeo 156 weights approximately 1025 kg more than 1972 McLaren M21.
Compare all specifications:
| 2005 Alfa Romeo 156 | 1972 McLaren M21 | |
| Make | Alfa Romeo | McLaren |
| Model | 156 | M21 |
| Year Released | 2005 | 1972 |
| Engine Size | 2492 cc | 1897 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 185 HP | 267 HP |
| Engine RPM | 5000 RPM | 10000 RPM |
| Vehicle Weight | 1490 kg | 465 kg |
