| Layout: | I4, single Garrett TR30R turbo |
| Displacement: | 1998 cc, 90 mm bore x 78.4 mm stroke |
| Valve configuration: | 16 valves, DOHC, chain driven |
| Horsepower: | 500+ hp (42 mm dia. restrictor) |
| Torque: | 442.5 lb-ft (42 mm dia. restrictor) |
| Length: | 512 mm |
| Width: | 410 mm |
| Height: | 552.4 mm |
| Weight: | 74 kgs |
Details: New AER designed engine with little basis in AER P07. Designed to accept direct injection as a future development. According to Mazda (March '07), direct injection system will be sourced from Mazda's road car production line. While variable geometry turbos are now legal for gasoline powered engines, for now the MZR-R is not utilzing this technology.
For 2008 the changes to the compression ratio and porting have been made in addition to piston revisions and continuing development of the turbo. The direct injection system continues to be developed and is currently (June '08) undergoing reliability testing in anticipation of it's introduction.
