The modern era is normally defined as the 25 years preceding the current year. However, there are some technical and design aspects that differentiate modern cars from antiques. The modern era has been one of increasing standardisation, platform sharing, and computer-aided design. Some particular contemporary developments are the proliferation of front- and all-wheel drive, the adoption of the diesel engine, and the ubiquity of fuel injection. Most modern passenger cars are front-wheel-drive monocoque/unibody designs, with transversely mounted engines. Body styles have changed as well in the modern era.Since the end of the 20th century, several award competitions of cars and trucks have become widely known, such as European Car of the Year Car of the Year Japan, North American Car of the Year, World Car of the Year, Truck of the Year, and International Car of the Year, so that vehicles of different classes, producers, and countries win alternately. Also, Car of the Century awards were held, in which in the US the Ford Model T was named as most influential car of the 20th century.