1972 McLaren M21 vs. 1973 Pontiac Firebird
To start off, 1973 Pontiac Firebird is newer by 1 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 6,547 cc (8 cylinders), 1973 Pontiac Firebird is equipped with a bigger engine. In terms of performance, 1973 Pontiac Firebird (285 HP @ 4400 RPM) has 2 more horse power than 1972 McLaren M21. (283 HP @ 9000 RPM) In normal driving conditions, 1973 Pontiac Firebird should accelerate faster than 1972 McLaren M21. With that said, vehicle weight also plays an important factor in acceleration. 1973 Pontiac Firebird weights approximately 1131 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:
| 1972 McLaren M21 | 1973 Pontiac Firebird | |
| Make | McLaren | Pontiac |
| Model | M21 | Firebird |
| Year Released | 1972 | 1973 |
| Engine Size | 1927 cc | 6547 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 283 HP | 285 HP |
| Engine RPM | 9000 RPM | 4400 RPM |
| Fuel Type | Gasoline | Gasoline |
| Vehicle Weight | 465 kg | 1596 kg |
