1972 McLaren M21 vs. 1972 Porsche 911
To start off, both 1972 McLaren M21 and 1972 Porsche 911 were released in the same year (1972). Therefore the support and the availability on parts for both vehicles should be relatively similar. At 2,687 cc (6 cylinders), 1972 Porsche 911 is equipped with a bigger engine. In terms of performance, 1972 McLaren M21 (283 HP @ 9000 RPM) has 73 more horse power than 1972 Porsche 911. (210 HP @ 6300 RPM). In normal driving conditions, 1972 McLaren M21 should accelerate faster than 1972 Porsche 911. With that said, vehicle weight also plays an important factor in acceleration. 1972 Porsche 911 weights approximately 591 kg more than 1972 McLaren M21.
Compare all specifications:
| 1972 McLaren M21 | 1972 Porsche 911 | |
| Make | McLaren | Porsche |
| Model | M21 | 911 |
| Year Released | 1972 | 1972 |
| Engine Size | 1927 cc | 2687 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Horse Power | 283 HP | 210 HP |
| Engine RPM | 9000 RPM | 6300 RPM |
| Vehicle Weight | 465 kg | 1056 kg |
