1949 Allard J vs. 1951 Alvis TB 21
To start off, 1951 Alvis TB 21 is newer by 2 year(s). Which means there will be less support and parts availability for 1949 Allard J. In addition, the cost of maintenance, including insurance, on 1949 Allard J would be higher. At 4,375 cc (8 cylinders), 1949 Allard J is equipped with a bigger engine. In terms of performance, 1949 Allard J (120 HP @ 3800 RPM) has 29 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM). In normal driving conditions, 1949 Allard J should accelerate faster than 1951 Alvis TB 21.
Compare all specifications:
| 1949 Allard J | 1951 Alvis TB 21 | |
| Make | Allard | Alvis |
| Model | J | TB 21 |
| Year Released | 1949 | 1951 |
| Engine Position | Front | Front |
| Engine Size | 4375 cc | 2993 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Horse Power | 120 HP | 91 HP |
| Engine RPM | 3800 RPM | 4000 RPM |
| Engine Compression Ratio | 8.0:1 | 7.1:1 |
| Number of Seats | 2 seats | 5 seats |
| Vehicle Length | 3770 mm | 4430 mm |
| Vehicle Width | 1610 mm | 1680 mm |
| Wheelbase Size | 2550 mm | 2750 mm |
