1951 Alvis TB 21 vs. 2006 Mercury Mariner
To start off, 2006 Mercury Mariner is newer by 55 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 2,999 cc (6 cylinders), 2006 Mercury Mariner is equipped with a bigger engine. In terms of performance, 2006 Mercury Mariner (200 HP @ 6000 RPM) has 109 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 2006 Mercury Mariner should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 2006 Mercury Mariner (262 Nm) has 58 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 2006 Mercury Mariner 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 | 2006 Mercury Mariner | |
| Make | Alvis | Mercury |
| Model | TB 21 | Mariner |
| Year Released | 1951 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 2999 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 200 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 204 Nm | 262 Nm |
| Engine Compression Ratio | 7.1:1 | 9.4:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 4450 mm |
| Vehicle Width | 1680 mm | 1790 mm |
| Wheelbase Size | 2750 mm | 2630 mm |
