The Dennis Javelin (later known as the Alexander Dennis Javelin) was an underfloor-engined bus and coach chassis manufactured by Dennis and later Alexander Dennis. It was unveiled in 1986 and acted more or less as a modern replacement for the discontinued Bedford Y series. It also supplanted the heavier Dennis Dorchester. While proving a success, it has never matched its nearest rival, the likewise heavier Volvo B10M, but has had much more success than Dennis's previous coaching industry attempts: The Falcon V, the Lancet and Dorchester.