1991 Ford Thunderbird vs. 2004 Kia Opirus
To start off, 2004 Kia Opirus is newer by 13 year(s). Which means there will be less support and parts availability for 1991 Ford Thunderbird. In addition, the cost of maintenance, including insurance, on 1991 Ford Thunderbird would be higher. At 4,942 cc (8 cylinders), 1991 Ford Thunderbird is equipped with a bigger engine. In terms of performance, 1991 Ford Thunderbird (197 HP @ 4000 RPM) has 1 more horse power than 2004 Kia Opirus. (196 HP @ 5500 RPM). In normal driving conditions, 1991 Ford Thunderbird should accelerate faster than 2004 Kia Opirus. With that said, vehicle weight also plays an important factor in acceleration. 2004 Kia Opirus weights approximately 8 kg more than 1991 Ford Thunderbird.
Because 1991 Ford Thunderbird is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 1991 Ford Thunderbird. However, in wet, icy, snow, or gravel driving conditions, 2004 Kia Opirus, being front wheel drive (FWD), will offer much better control with better grip. 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, 1991 Ford Thunderbird (373 Nm @ 3000 RPM) has 79 more torque (in Nm) than 2004 Kia Opirus. (294 Nm @ 3500 RPM). This means 1991 Ford Thunderbird will have an easier job in driving up hills or pulling heavy equipment than 2004 Kia Opirus.
Compare all specifications:
| 1991 Ford Thunderbird | 2004 Kia Opirus | |
| Make | Ford | Kia |
| Model | Thunderbird | Opirus |
| Year Released | 1991 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 4942 cc | 3497 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 197 HP | 196 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 373 Nm | 294 Nm |
| Torque RPM | 3000 RPM | 3500 RPM |
| Engine Bore Size | 101.6 mm | 93 mm |
| Engine Stroke Size | 76.2 mm | 85.8 mm |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Front |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1752 kg | 1760 kg |
| Vehicle Length | 5050 mm | 4960 mm |
| Vehicle Width | 1850 mm | 1860 mm |
| Vehicle Height | 1350 mm | 1490 mm |
| Wheelbase Size | 2880 mm | 2810 mm |
