Is the car a manual transmission or automatic, and how many gears does it have? If it's a 5-speed manual, then it's totally fine...a lot of 5-speed manual cars have short ratios. For example, when I had my 03 VW Jetta 2.0 5-speed, at 100km/h in 5th gear, the engine would be turning at 2,800-3,000rpm.