Despite the many rumors the 5.0 V8 was not to return for the new IS F, well it was only part right. The IS F’s replacement is the all new 2015 RC F, a sporting and sexy coupe. And that V8? It’s back with even more power than before.

At the Detroit Auto Show, Lexus unveiled all-new 2015 RC F which is based on the new 2015 RC coupe. A dedicated ultra-performance model, it gets a 450 + horsepower version of the 5.0 liter V8, Lexus most powerful V8 yet.

To make this engine perform for fuel economy too, the RC F uses the Atkinson cycle at cruising speeds for enhanced fuel economy, but switches to the Otto cycle at higher rpm to belt out power when asked.

The 5.0 liter V8 is again mated to a performance calibrated eight-speed automatic transmission with with paddle shifters with rev matching.

Getting that power to the ground is an innovative and driver adjustable torque vectoring differential which has a console mounted selector. With three settings, standard, slalom and track the system adjusts torque delivery for the best cornering lines.

Based loosely on the Lexus IS platform, the RC F has a wide body with large cross-section rocker panels substantial bracing. The body is tight with new manufacturing techniques including body adhesives, laser-screw welding, laser brazing and multi-spot welding.

The RC F has a fully independent suspension with mono-tube gas shock absorbers and ball-jointed stabilizer bars. New 19” forged aluminum wheels minimize un-sprung weight.

To styling, the RC F gets its own interpretation of the Lexus signature spindle grille with a subtle F-mesh pattern on the lower half. In silhouette, the RC F has a bulging hood which accentuates the muscular intent of the car well.

At the rear is an active spoiler incorporated into the trunk lid to give down force at speeds of more than 50 mph. The active spoiler is a part of RC F’s aerodynamics which include tuning of the under-body, the intakes in the grille and the front fender vents.

While it borrows from the IS sedan a bit for the cabin, the RC F has a uniquely designed instrument cluster, steering wheel, seats, ornamentation and pedals. It’s sporting and luxurious at the same time, giving a sense of high style.

The instrument cluster has a large center tachometer that changes according to drive mode. There’s a digital and analog speedometer, differential torque vectoring monitor, G-Force meter, oil and water temperature gauges, and even a stopwatch.

The RC F promises to take the legacy of the IS F sedan forward, offering an exclusive performance experience to compete with cars like the BMW M4. As Lexus has said, it’s built and designed with uncompromising grit. We will see when get behind the wheel later this year.

For a full report and photo gallery log onto