The BMW IV was a six-cylinder, water-cooled inline aircraft engine built in Germany in the 1920s.

On 17 June 1919 Franz Zeno Diemer flew a DFW F37, powered by a BMW IV engine to an unofficial world record height of 9,760 m (32,021 ft) from Oberwiesenfeld, reaching that altitude in 89 minutes.

[1] Diemer stated at the time, "I could have gone much higher, but I didn't have enough oxygen.

"[citation needed] Data from BMW Type IV description and user manual.

[2] Comparable engines Related lists