The successor to the successful Land Rover Series I was the Series II, which saw a production run from 1958 to 1961. It came in 88in and 109in wheelbases (normally referred to as the 'SWB' and 'LWB'). This was the first Land Rover to receive the attention of Rover's styling department. The Series II was the first vehicle to use the well-known 2.25-litre petrol engine, although the first 1,500 or so short wheelbase (SWB) models retained the 52 hp 2.0-litre petrol engine from the Series I. This larger petrol engine produced 72 hp (54 kW) and was closely related to the 2.0-litre diesel unit still in use. This engine became the standard Land Rover unit until the mid-1980s when diesel engines became more popular.