1951 Alvis TB 21 vs. 1983 Pontiac Firebird
To start off, 1983 Pontiac Firebird is newer by 32 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, 1983 Pontiac Firebird (134 HP) has 43 more horse power than 1951 Alvis TB 21. (91 HP) In normal driving conditions, 1983 Pontiac Firebird should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1983 Pontiac Firebird (223 Nm) has 19 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1983 Pontiac Firebird 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 | 1983 Pontiac Firebird | |
| Make | Alvis | Pontiac |
| Model | TB 21 | Firebird |
| Year Released | 1951 | 1983 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 2827 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 91 HP | 134 HP |
| Torque | 204 Nm | 223 Nm |
| Engine Bore Size | 84 mm | 88.9 mm |
| Engine Stroke Size | 90 mm | 75.9 mm |
| Engine Compression Ratio | 7.1:1 | 8.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Length | 4430 mm | 4880 mm |
| Vehicle Width | 1680 mm | 1860 mm |
| Wheelbase Size | 2750 mm | 2580 mm |
