1978 Triumph TR7 vs. 1968 Triumph 2.5
To start off, 1978 Triumph TR7 is newer by 10 year(s). Which means there will be less support and parts availability for 1968 Triumph 2.5. In addition, the cost of maintenance, including insurance, on 1968 Triumph 2.5 would be higher. At 2,498 cc (6 cylinders), 1968 Triumph 2.5 is equipped with a bigger engine. In terms of performance, 1968 Triumph 2.5 (150 HP @ 5500 RPM) has 44 more horse power than 1978 Triumph TR7. (106 HP @ 5500 RPM) In normal driving conditions, 1968 Triumph 2.5 should accelerate faster than 1978 Triumph TR7. With that said, vehicle weight also plays an important factor in acceleration. 1968 Triumph 2.5 weights approximately 88 kg more than 1978 Triumph TR7. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 1968 Triumph 2.5 (222 Nm @ 3500 RPM) has 60 more torque (in Nm) than 1978 Triumph TR7. (162 Nm @ 3500 RPM). This means 1968 Triumph 2.5 will have an easier job in driving up hills or pulling heavy equipment than 1978 Triumph TR7.
Compare all specifications:
| 1978 Triumph TR7 | 1968 Triumph 2.5 | |
| Make | Triumph | Triumph |
| Model | TR7 | 2.5 |
| Year Released | 1978 | 1968 |
| Engine Position | Front | Front |
| Engine Size | 1998 cc | 2498 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 106 HP | 150 HP |
| Engine RPM | 5500 RPM | 5500 RPM |
| Torque | 162 Nm | 222 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Engine Bore Size | 90.3 mm | 74.7 mm |
| Engine Stroke Size | 78 mm | 95 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1045 kg | 1133 kg |
| Vehicle Length | 4070 mm | 4420 mm |
| Vehicle Width | 1690 mm | 1660 mm |
| Wheelbase Size | 2170 mm | 2700 mm |
| Fuel Tank Capacity | 55 L | 64 L |
