The design was based on its predecessor, the Leyland Olympian, but the chassis was modified such that only the chassis design and layout remained, with even the grade of steel for the chassis members being changed, Volvo's standard electrical system was used, as well as standard Volvo steering/"Z cam" braking systems. The early Volvo Olympians were offered with Cummins L10 or Volvo TD102KF engine, coupled to Voith DIWA or ZF Ecomat gearbox. From late 1996, only the 9.6-litre Volvo D10A-245 Euro II engine with electronic diesel control was offered.