1955 Alvis TC 21 vs. 1972 McLaren M21
To start off, 1972 McLaren M21 is newer by 17 year(s). Which means there will be less support and parts availability for 1955 Alvis TC 21. In addition, the cost of maintenance, including insurance, on 1955 Alvis TC 21 would be higher. At 2,993 cc (6 cylinders), 1955 Alvis TC 21 is equipped with a bigger engine. In terms of performance, 1972 McLaren M21 (283 HP @ 9000 RPM) has 178 more horse power than 1955 Alvis TC 21. (105 HP @ 4000 RPM) In normal driving conditions, 1972 McLaren M21 should accelerate faster than 1955 Alvis TC 21. With that said, vehicle weight also plays an important factor in acceleration. 1955 Alvis TC 21 weights approximately 985 kg more than 1972 McLaren M21.
Compare all specifications:
| 1955 Alvis TC 21 | 1972 McLaren M21 | |
| Make | Alvis | McLaren |
| Model | TC 21 | M21 |
| Year Released | 1955 | 1972 |
| Engine Size | 2993 cc | 1927 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 105 HP | 283 HP |
| Engine RPM | 4000 RPM | 9000 RPM |
| Vehicle Weight | 1450 kg | 465 kg |
