Clive Sinclair 1985 owing to Sinclair's financial troubles.) The following year, he received a knighthood and formed Sinclair Vehicles Ltd. to develop electric vehicles, which resulted in the unsuccessful Sinclair C5 in 1985. In 1984, Sinclair launched the Sinclair QL computer, intended for professional users. Development of the ZX Spectrum continued with the enhanced ZX Spectrum 128 in 1985. In April 1986, Sinclair Research sold the Sinclair trademark and computer business to Amstrad for £5 million. Sinclair Research Ltd. was reduced to an R&D business and holding company, with shareholdings in several spin-off companies, formed to exploit technologies developed by the company.
Sinclair C5 However, it imposed a number of restrictions that limited the performance of any vehicle that would qualify under the new standards. The maximum legal speed of the vehicle would be limited to only ; it could not weigh any more than , including the battery; and its motor could not be rated at any more than 250 watts. Despite these limitations, the vehicle was seen as only the first step in a series of increasingly ambitious electrical cars. Sinclair intended it to prove the viability of electric personal transport; the hope was that, just as Sinclair had found with home