1972 McLaren M21 vs. 2005 Mercedes-Benz R
To start off, 2005 Mercedes-Benz R 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 4,966 cc (8 cylinders), 2005 Mercedes-Benz R is equipped with a bigger engine. In terms of performance, 2005 Mercedes-Benz R (302 HP @ 4200 RPM) has 35 more horse power than 1972 McLaren M21. (267 HP @ 10000 RPM) In normal driving conditions, 2005 Mercedes-Benz R should accelerate faster than 1972 McLaren M21. With that said, vehicle weight also plays an important factor in acceleration. 2005 Mercedes-Benz R weights approximately 1775 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 | 2005 Mercedes-Benz R | |
| Make | McLaren | Mercedes-Benz |
| Model | M21 | R |
| Year Released | 1972 | 2005 |
| Engine Size | 1897 cc | 4966 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 267 HP | 302 HP |
| Engine RPM | 10000 RPM | 4200 RPM |
| Vehicle Weight | 465 kg | 2240 kg |
