1951 Alvis TB 21 vs. 1978 AMC Pacer
To start off, 1978 AMC Pacer is newer by 27 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 4,228 cc (6 cylinders), 1978 AMC Pacer is equipped with a bigger engine. In terms of performance, 1978 AMC Pacer (110 HP @ 3500 RPM) has 19 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1978 AMC Pacer should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1978 AMC Pacer (265 Nm) has 61 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1978 AMC Pacer 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 | 1978 AMC Pacer | |
| Make | Alvis | AMC |
| Model | TB 21 | Pacer |
| Year Released | 1951 | 1978 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4228 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 91 HP | 110 HP |
| Engine RPM | 4000 RPM | 3500 RPM |
| Torque | 204 Nm | 265 Nm |
| Engine Bore Size | 84 mm | 95.2 mm |
| Engine Stroke Size | 90 mm | 99 mm |
| Engine Compression Ratio | 7.1:1 | 8.0:1 |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 4360 mm |
| Vehicle Width | 1680 mm | 1960 mm |
| Wheelbase Size | 2750 mm | 2550 mm |
