Engine refers to a machine that gets its power from external means (steam, gas, coal, turbine) whereas a motor is electric. If you delve into R/C world, this is generally the accepted term. Gas = engine, electric = motor.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth