1991 Ford Thunderbird vs. 2001 Lotec Sirius
To start off, 2001 Lotec Sirius is newer by 10 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 5,987 cc (12 cylinders), 2001 Lotec Sirius is equipped with a bigger engine. In terms of performance, 2001 Lotec Sirius (1,185 HP @ 6800 RPM) has 1047 more horse power than 1991 Ford Thunderbird. (138 HP @ 3800 RPM) In normal driving conditions, 2001 Lotec Sirius should accelerate faster than 1991 Ford Thunderbird. With that said, vehicle weight also plays an important factor in acceleration. 1991 Ford Thunderbird weights approximately 330 kg more than 2001 Lotec Sirius.
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, 2001 Lotec Sirius (1,346 Nm @ 3400 RPM) has 1055 more torque (in Nm) than 1991 Ford Thunderbird. (291 Nm @ 2400 RPM). This means 2001 Lotec Sirius will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Thunderbird.
Compare all specifications:
| 1991 Ford Thunderbird | 2001 Lotec Sirius | |
| Make | Ford | Lotec |
| Model | Thunderbird | Sirius |
| Year Released | 1991 | 2001 |
| Engine Position | Front | Middle |
| Engine Size | 3791 cc | 5987 cc |
| Engine Cylinders | 6 cylinders | 12 cylinders |
| Engine Type | in-line | V |
| Horse Power | 138 HP | 1185 HP |
| Engine RPM | 3800 RPM | 6800 RPM |
| Torque | 291 Nm | 1346 Nm |
| Torque RPM | 2400 RPM | 3400 RPM |
| Fuel Type | Gasoline | Gasoline |
| Drive Type | Rear | Rear |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1610 kg | 1280 kg |
| Vehicle Length | 5050 mm | 4130 mm |
| Vehicle Width | 1850 mm | 2090 mm |
| Vehicle Height | 1350 mm | 1130 mm |
