Like its predecessor, the 780 was designed and built by Carrozzeria Bertone in Turin, Italy. The hood, trunk, and roof lines were all slightly lower than the standard 700 series profile, and the C-pillar was wider and had a more gradual slope down to the trunk. Headroom was improved over the 262C because of Bertone's 1 cm lowering of the roofline. Window frames all had black matte trim, and were accented with chrome. Chrome also highlighted the door handles, bumpers, and side mouldings. Originally, it had been planned to use a smaller, 2,458 cc turbocharged, version of the PRV V6 (as seen in the Renault 25 and Alpine), which had been successfully tested in 740s and 760s. In the smaller engine compartment of the 780, however, the engine overheated and the PRV V6 Turbo never appeared in a Volvo.