2005 Mazda Senku Concept

The 2005 Mazda Senku Concept is a four-seat sports coupe showcasing Mazda’s vision for future design and technology. It features the world’s first rotary hybrid drivetrain, combining a new direct-injection, two-rotor engine with an electric motor, generator, and battery. The layout enables a 50:50 weight distribution and low center of gravity, thanks to the compact rotary engine and front-midship setup. It also includes an idling-stop system for improved fuel economy.

Measuring 183 inches long, 73 inches wide, and 55 inches high, the Senku is significantly larger than the RX-8, with a 122-inch wheelbase. The body uses a new “multi-frame” construction to enhance rigidity and crash safety while reducing weight. Its most striking features are massive power sliding "flying wing" doors, a two-stage rear hatch with integrated solar panels, and an interior blending high-end leather with red and black Japanese-inspired styling.

Inside, the concept features a two-level digital dashboard, with the top showing exterior camera feeds and the lower section for climate and audio controls. The multifunction display and gauges are built into a thick, conical, red leather-wrapped steering wheel. Though normally a two-seater, the Senku can accommodate two extra passengers or cargo behind the front seats.

Other highlights include a seven-speed transmission with a dry twin-plate clutch, double-wishbone front and multilink rear suspension, and 22-inch Yokohama Advan tires. The translucent front grille, first seen on the Mazda Sassou, reappears here, signaling future design direction. While it’s unclear which features would make production, the Senku was seen as a potential RX-8 successor.