Competitive pricing led to commercial success, and Kadetts continued to be produced during the early months of the war: by the time production ended in May 1940, following intensification of World War II, 106,608 of these Opel Kadetts had come off the assembly line at Opel's Rüsselsheim plant, which had been the first major car plant in Germany to apply the assembly-line production techniques pioneered by Henry Ford.
The Rally’s 1100 cc SR engine was hardly a drag-strip terror: the little 1100cc buzz-bomb got higher compression and a second carburetor, as well as possibly some other changes. The result was 67 gross/60 DIN-net hp. And what little torque there was, now moved even higher into the rpm range. I can hear their raspy and nervous exhaust in my ears still, as common as they were now in the Towson area. Undoubtedly, they improved on the regular Kadett’s 21 second 0-60 dash by maybe a couple of seconds. But they looked good doing it, as well as sounding good.
At the first round of the season held at the former Grand Prix track of Zolder in Belgium, Opel Team Joest’s misfortunes continued. Manuel Reuter retired in the early stages, with both John Winter (16th) and Keke Rosberg finishing a lap down on winner Alessandro Nannini (ITA) in the Alfa. Race 2 was more positive however, with only John Winter dropping early on. Reuter lead the Opel charge in 7th, with Rosberg in 10th.
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.