They are so different that they are the same. Both designations mean inline 4 cylinder. Where all four cylinders of your engine are one behind the other in a line. The only other configuration is horrizontally opposed also called H4 (like subaru's). A V4 is near impossible to make and work right in a car.
A forum community dedicated to Mazda MX-6 owners and enthusiasts. Come join the discussion about restorations, performance, upgrades, modifications, classifieds, troubleshooting, maintenance, and more!
