1965 Alfa Romeo Spider vs. 1951 Alvis TB 21
To start off, 1965 Alfa Romeo Spider is newer by 14 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, 1965 Alfa Romeo Spider (163 HP @ 5900 RPM) has 72 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM). In normal driving conditions, 1965 Alfa Romeo Spider should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1965 Alfa Romeo Spider (220 Nm) has 16 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1965 Alfa Romeo Spider will have an easier job in driving up hills or pulling heavy equipment than 1951 Alvis TB 21.
Compare all specifications:
| 1965 Alfa Romeo Spider | 1951 Alvis TB 21 | |
| Make | Alfa Romeo | Alvis |
| Model | Spider | TB 21 |
| Year Released | 1965 | 1951 |
| Engine Position | Front | Front |
| Engine Size | 2582 cc | 2993 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 163 HP | 91 HP |
| Engine RPM | 5900 RPM | 4000 RPM |
| Torque | 220 Nm | 204 Nm |
| Engine Bore Size | 83 mm | 84 mm |
| Engine Stroke Size | 79.6 mm | 90 mm |
| Engine Compression Ratio | 9.2:1 | 7.1:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Length | 4510 mm | 4430 mm |
| Vehicle Width | 1610 mm | 1680 mm |
| Wheelbase Size | 2510 mm | 2750 mm |
