only net horsepower ratings were offered, with power up to at 4,800 rpm. As for all three generations of HAs, the compression ratio remained 7.3 to 1. For the lighter duty HA 110 there was also an 'Economy' version, with a CD carburettor (constant depression), a redesigned manifold, and a different camshaft. This version offered up to 30% lower fuel consumption, although power did drop to at 3,800 rpm. The HA continued on in production for twenty years, until 1983, when it was supplanted by the short lived Vauxhall Chevette based Bedford Chevanne which was in turn replaced by the Opel-based Bedford Astravan / Bedford Astramax. Despite the fact that the Vauxhall Viva upon which it was based had gone through two further model generations, the bodywork of the HA van stayed the same until its eventual discontinuation in 1983, although it did receive some of the technical upgrades from the newer HB and HC Vivas. The engine arrived in 1967, followed by a in 1972. A pickup was also made by Martin Walter (Dormobile) - who also made the Beagle conversion - and by Walker Bodies of Watford. Made in very small numbers (believed to be around 60 in total) only a handful of these survive today: they were originally sold to companies and private buyers directly through Vauxhall/Bedford dealerships. The BTV In the early 1970s there were a number of basic utility vehicles developed for the developing world. Volkswagen (EA489), Citroën (FAF), and many others including General Motors tried to create cheap and basic transport which could be manufactured locally with a minimal up-front investment. GM's effort was developed by General Motors Overseas Operations (GMOO) and was called the "Basic Transportation Vehicle" (BTV). It was marketed under a variety of names depending on where it was built. The little truck has a simple body made up entirely of flat surfaces placed atop a basic frame, while most mechanicals and what interior there was derived from the HA. It also uses the HA's 1,256 cc low-compression engine, here with , which together with some of the other more complex elements was sent from Vauxhall's Luton plant. The BTV was at one time or another manufactured in Malaysia (as the Bedford Harimau, this was the first iteration to be manufactured, from May 1972), Costa Rica (Amigo), Ecuador (Andino), Nicaragua (Pinolero, by INDEVESA, S.A.), Paraguay (GM Mitaí), the Philippines (Amigo or