The letters “FJ” in the Toyota FJ Cruiser and classic FJ40 Land Cruiser designate the engine series used in these vehicles. Specifically, the “F” indicates that the vehicle is equipped with an F-series engine, while the “J” signifies that it is a Jeep-type vehicle, a common descriptor for four-wheel-drive vehicles during the period when the original FJ40 was developed.
Understanding the origin of this designation provides insight into Toyota’s engineering and marketing strategies during the mid-20th century. The F-series engines were known for their durability and reliability, making them well-suited for the rugged demands of off-road driving. This designation also served to communicate the vehicle’s intended use and target market: those seeking a capable and dependable four-wheel-drive vehicle.