: The initial production variant. It featured a shorter wingspan (approx. 60 ft) and was powered by 1,200 hp Jumo 211B-1 engines. Combat during the Battle of Britain revealed it was under-armed and structurally limited for heavy maneuvers.
: An interim "stop-gap" model created when A-4 airframes were ready but their newer Jumo 211J engines were delayed. It used the longer A-4 wings but retained the 1,200 hp engines from the A-1. Specialized Variants Junkers Ju-88A: All models
The A-series was adapted for numerous niche roles beyond standard bombing: Junkers Ju88 A4 - A5 - Aircraft WWII - Britmodeller.com : The initial production variant