The 2015 Equus is powered by Hyundai’s 5.0-liter Tau DOHC V8 engine, producing 429 horsepower at 6,400 rpm and 376 lb.-ft. of torque at 5,000 rpm, with a higher specific output (85.8 hp/liter) than its normally-aspirated premium luxury competitors. The Tau V8 engine creates this high output level while retaining exceptionally smooth power delivery throughout its rpm range, without the turbo lag and surge exhibited by some forced-induction engines.
The 5.0-liter Tau also features direct injection technology. This high-pressure direct injection system (over 2,200 psi) dramatically increases power and torque, while reducing fuel consumption and emissions. The 5.0-liter Tau has a high 11.5:1 compression ratio for greater thermal efficiency and output. It also has a bed plate for improved block rigidity and lower NVH, as well as camshaft carriers and a roller timing chain to improve valvetrain stability.
This V8 engine offers premium engine technologies, including Dual Continuously Variable Valve Timing (D-CVVT), a tuned variable induction system, and low-friction diamond-like coatings (DLC) on piston skirts, rings and tappets. Even with these impressive power increases, EPA fuel economy is estimated at 15 mpg city, 23 mpg highway and 18 mpg combined.
The Tau V8 engine is coupled with a Hyundai-developed eight-speed transmission with SHIFTRONIC® manual shift capability for enhanced acceleration and overall efficiency.