A sports car is an automobile designed for performance driving. Most sports cars are rear-wheel drive, have two seats, two doors, and are designed for precise handling, acceleration, and aesthetics. A sports car's dominant considerations can be superior road handling, braking, manoeuverability, low weight, and high power, rather than passenger space, comfort, and fuel economy. ********************************* Sports cars can be either luxurious or Spartan, but driving mechanical performance is the key attraction. Drivers regard brand name and the subsequent racing reputation and history (for example, Ferrari, Porsche, Lotus) as important indications of sporting quality, but brands such as Lamborghini, which do not race or build racing cars, are also highly regarded. ****************************** A car may be a sporting automobile without being a sports car. Performance modifications of regular, production cars, such as sport compacts, sports sedans, muscle cars, hot hatches and the like, generally are not sports cars, yet share traits common to sports cars. Often, performance cars of all configurations are grouped as Sports and GT cars, or, occasionally, as performance cars. ******************************** A sports car does not require a large, powerful engine, though many do have them. Some classic British sports cars lacked powerful engines, but were known for exceptional handling due to light weight, a well-engineered, balanced chassis, and modern suspension. On tight, twisting roads, such an automobile performs more effectively than a heavier, more powerful luxury car with less manoeuverability. ****************************** Due to North American safety regulations, many sports cars are unavailable for sale or use in the United States and Canada. In the United Kingdom, Europe, and the Middle Eastern market (e.g. UAE), a flexible attitude towards small-volume specialist manufacturers has allowed companies such as TVR, Noble, and Pagani to succeed.