1984 Ford Sierra vs. 1990 Ford Thunderbird
To start off, 1990 Ford Thunderbird is newer by 6 year(s). Which means there will be less support and parts availability for 1984 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1984 Ford Sierra would be higher. At 3,791 cc (6 cylinders), 1990 Ford Thunderbird is equipped with a bigger engine. In terms of performance, 1990 Ford Thunderbird (139 HP @ 3800 RPM) has 64 more horse power than 1984 Ford Sierra. (75 HP @ 5300 RPM) In normal driving conditions, 1990 Ford Thunderbird should accelerate faster than 1984 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 1990 Ford Thunderbird weights approximately 570 kg more than 1984 Ford Sierra. 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, 1990 Ford Thunderbird (291 Nm @ 2400 RPM) has 172 more torque (in Nm) than 1984 Ford Sierra. (119 Nm @ 2900 RPM). This means 1990 Ford Thunderbird will have an easier job in driving up hills or pulling heavy equipment than 1984 Ford Sierra.
Compare all specifications:
| 1984 Ford Sierra | 1990 Ford Thunderbird | |
| Make | Ford | Ford |
| Model | Sierra | Thunderbird |
| Year Released | 1984 | 1990 |
| Engine Position | Front | Front |
| Engine Size | 1608 cc | 3791 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 75 HP | 139 HP |
| Engine RPM | 5300 RPM | 3800 RPM |
| Torque | 119 Nm | 291 Nm |
| Torque RPM | 2900 RPM | 2400 RPM |
| Engine Bore Size | 87.8 mm | 96.8 mm |
| Engine Stroke Size | 66 mm | 86 mm |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1040 kg | 1610 kg |
| Vehicle Length | 4500 mm | 5050 mm |
| Vehicle Width | 1720 mm | 1850 mm |
| Vehicle Height | 1450 mm | 1350 mm |
| Wheelbase Size | 2610 mm | 2880 mm |
| Fuel Tank Capacity | 60 L | 45 L |
