For the 1985 model year, the two-door Skylark coupe was replaced by the Somerset Regal, built on the Oldsmobile-developed N-body platform. The "Somerset" name had previously been used as a trim package on the Regal. This generation of compact Buicks featured a more upscale and aerodynamic design than its predecessor, incorporating the long-hood/short-deck look popular at the time. The Pontiac-produced Iron Duke engine continued from the Skylark, but an Isuzu-sourced five-speed manual transmission replaced the four-speed as standard equipment. A new multi-port fuel-injected Buick V6, generating at 4900 rpm, replaced the Chevrolet-designed 2.8 L V6 and was paired only with a three-speed automatic transmission. The Somerset featured an all-digital instrument cluster.