1951 Alvis TB 21 vs. 1966 Mercury Comet
To start off, 1966 Mercury Comet is newer by 15 year(s). Which means there will be less support and parts availability for 1951 Alvis TB 21. In addition, the cost of maintenance, including insurance, on 1951 Alvis TB 21 would be higher. At 4,738 cc (8 cylinders), 1966 Mercury Comet is equipped with a bigger engine. In terms of performance, 1966 Mercury Comet (198 HP @ 4400 RPM) has 107 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1966 Mercury Comet should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1966 Mercury Comet (382 Nm) has 178 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1966 Mercury Comet will have an easier job in driving up hills or pulling heavy equipment than 1951 Alvis TB 21.
Compare all specifications:
| 1951 Alvis TB 21 | 1966 Mercury Comet | |
| Make | Alvis | Mercury |
| Model | TB 21 | Comet |
| Year Released | 1951 | 1966 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4738 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 91 HP | 198 HP |
| Engine RPM | 4000 RPM | 4400 RPM |
| Torque | 204 Nm | 382 Nm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 5000 mm |
| Vehicle Width | 1680 mm | 1880 mm |
| Wheelbase Size | 2750 mm | 2950 mm |
