The year 1994 was a transition year for Ilmor. With General Motors withdrawing the famous Chevrolet name at the end of 1993 and Mercedes-Benz yet to formally commit, the 4 cam V8’s raced under the Ilmor banner for the first time.
Although not radically different to the Chevrolet 265C of 1993 the D engine featured a slightly wider Vee angle at 82 degrees compared to the 80 degrees of the previous year.
Bore and stroke were also altered but the traditional features of the Ilmor Indy engines, the rear mounted gear train and mass damper gears, were retained.
Mercedes signed on for the 1994 season and the engine became known as the Mercedes 265D.