1970 Alfa Romeo Spider vs. 1951 Alvis TB 21
To start off, 1970 Alfa Romeo Spider is newer by 19 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, 1970 Alfa Romeo Spider (103 HP @ 6000 RPM) has 12 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM). In normal driving conditions, 1970 Alfa Romeo Spider should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1951 Alvis TB 21 (204 Nm) has 66 more torque (in Nm) than 1970 Alfa Romeo Spider. (138 Nm). This means 1951 Alvis TB 21 will have an easier job in driving up hills or pulling heavy equipment than 1970 Alfa Romeo Spider.
Compare all specifications:
| 1970 Alfa Romeo Spider | 1951 Alvis TB 21 | |
| Make | Alfa Romeo | Alvis |
| Model | Spider | TB 21 |
| Year Released | 1970 | 1951 |
| Engine Position | Front | Front |
| Engine Size | 1290 cc | 2993 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 103 HP | 91 HP |
| Engine RPM | 6000 RPM | 4000 RPM |
| Torque | 138 Nm | 204 Nm |
| Engine Bore Size | 78 mm | 84 mm |
| Engine Stroke Size | 67.5 mm | 90 mm |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Length | 4130 mm | 4430 mm |
| Vehicle Width | 1630 mm | 1680 mm |
| Wheelbase Size | 2260 mm | 2750 mm |
