1951 Alvis TB 21 vs. 1963 Triumph TR4
To start off, 1963 Triumph TR4 is newer by 12 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 2,993 cc (6 cylinders), 1951 Alvis TB 21 is equipped with a bigger engine. In terms of performance, 1963 Triumph TR4 (104 HP @ 4600 RPM) has 13 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1963 Triumph TR4 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1951 Alvis TB 21 (204 Nm) has 32 more torque (in Nm) than 1963 Triumph TR4. (172 Nm). This means 1951 Alvis TB 21 will have an easier job in driving up hills or pulling heavy equipment than 1963 Triumph TR4.
Compare all specifications:
| 1951 Alvis TB 21 | 1963 Triumph TR4 | |
| Make | Alvis | Triumph |
| Model | TB 21 | TR4 |
| Year Released | 1951 | 1963 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 2138 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 91 HP | 104 HP |
| Engine RPM | 4000 RPM | 4600 RPM |
| Torque | 204 Nm | 172 Nm |
| Engine Bore Size | 84 mm | 86 mm |
| Engine Stroke Size | 90 mm | 92 mm |
| Engine Compression Ratio | 7.1:1 | 9.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 2 seats |
| Vehicle Length | 4430 mm | 3950 mm |
| Vehicle Width | 1680 mm | 1480 mm |
| Wheelbase Size | 2750 mm | 2240 mm |
