The range has a high level standard specification compared to similar vehicles from other manufacturers, including a lane departure warning system, cruise control, speed limiter, trip computer (instant MPG, average MPG, average speed, stop watch and trip computer), tyre pressure monitoring system, electronic stability program and traction control, front fog lamps and cornering lamps.
Opel's relationship to GM in America during the war has been disputed. Alfred P. Sloan's memoir indicates that when the war started, as Germany nationalised many foreign-owned industrial assets, GM's contact with Opel was broken and remained that way for the rest of the war. Other writers have alleged that even after June 1940, official connections between Opel and America were not broken, and monetary gain by Americans continued throughout the war.
Technically, Calibra was closely related to the first generation Opel Vectra. It was styled by General Motor's designer Wayne Cherry and German designer Erhard Schnell. The Calibra united exciting design with optimized aerodynamics and everyday practicality. The wide-opening tailgate gave easy access to a versatile, 980-liter luggage compartment. Generous standard equipment included power steering, a five-speed close-ration gearbox, a six-speaker audio system and tinted windows. Air conditioning, a four-speed automatic transmission and an electric tilt/slide sunroof were among the options.
While the Ipanema clearly succeeded the Marajó, production of the Chevette (by now in sedan form only, the hatchback having been discontinued after the 1987 model year) and of the Kadett noticeably overlapped; the newer model was placed above the old one in Chevrolet's lineup. While Chevrolet entertained the possibility of a pick-up version of the Kadett E, it never materialized.