RPM Automotive Services & Rpm Engines & Machine has been in business for 30 years, 21 years in Sonoma County, California. Over the years we have strive to offer the best quality of engine machine work available. Our relentless pursuit of this has taken the company to new heights in the performance, general engine machining and automotive service and repair. History Established in 1982. In 1994 RPM started offering complete automotive repair, including performance tuning, brake work, fabrication, engine installation, computer diagnostic and more.. Our Facility encompasses 10,000 sq. ft. of which 4,000 is machine shop and fabrication, and the remaining 6,000 sq. ft. is our automotive repair & fleet maintenance facility.. We are now able to offer complete one stop shopping for all of your personal chariot needs.