1951 Alvis TB 21 vs. 1963 Riley 4
To start off, 1963 Riley 4 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, 1951 Alvis TB 21 (91 HP) has 24 more horse power than 1963 Riley 4. (67 HP). In normal driving conditions, 1951 Alvis TB 21 should accelerate faster than 1963 Riley 4.
Let's talk about torque, 1951 Alvis TB 21 (204 Nm) has 83 more torque (in Nm) than 1963 Riley 4. (121 Nm). This means 1951 Alvis TB 21 will have an easier job in driving up hills or pulling heavy equipment than 1963 Riley 4.
Compare all specifications:
| 1951 Alvis TB 21 | 1963 Riley 4 | |
| Make | Alvis | Riley |
| Model | TB 21 | 4 |
| Year Released | 1951 | 1963 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 1622 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 91 HP | 67 HP |
| Torque | 204 Nm | 121 Nm |
| Engine Bore Size | 84 mm | 76.2 mm |
| Engine Stroke Size | 90 mm | 88.9 mm |
| Engine Compression Ratio | 7.1:1 | 8.3:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 4540 mm |
| Vehicle Width | 1680 mm | 1620 mm |
| Wheelbase Size | 2750 mm | 2530 mm |
