直列4気筒
The BP, featuring a bore x stroke of , is a DOHC 4 valves per cylinder variant of the B8. This Inline-four engine was called "'BP-ZE" by Mazda engineers' and featured a forged crankshaft, piston oil squirters, a structural aluminium oil pan with cooling fins, a 7,000 rpm redline, and Variable Inertia Charging System (VICS) which is activated by a control solenoid at high rpm to increase horsepower in the upper rev range. The engine in base form on 91 RON fuel produces at 6,000 rpm and at 4,000 rpm. The engine is a favourite for both N/A and turbo motoring enthusiasts for its robust design, materials and construction. This particular variant can be found in the following vehicles: