Whether it's a super-quick sedan or a low-slung sports car, being able to get up to speed with haste can cost upwards of $100,000. But what if we told you that it's not always the case?

Under the current rules, speed limits for cars are set at 30mph in built-up areas, 60mph on single carriageways and 70mph on dual carriageways and motorways. However, local authorities are able to ...