What is Reihenmotor?
German in origin, the word "Reihenmotor" is roughly translated in English to "in-line".
Reihenmotor is the "R" in a Jetta VR6. The V standing for "vee" and the R standing for "Reihenmotor".
Translated to a "In-line Vee Six"
See KeizerSoze