|If you think the new Lexus RC F is powerful enough, think again…Lexus has announced a new V8 engine for its thoroughbred performance speedster. It is the most powerful V8 Lexus has ever produced for a road-going car.|
The new 5.0-liter V8 powerplant benefits from detailed design and engineering to deliver an exhilarating experience, from the moment the driver presses the throttle. It isn’t just about power, however. This is an engine that is smooth, responsive and, thanks to its ability to switch between different operating cycles according to conditions, highly efficient. Its qualities are perfectly matched by the latest development of Lexus’s eight-speed Sports Direct Shift transmission.
The 4,969cc 32-valve unit has evolved from the engine featured in the previous IS F variant, but comprehensive changes have taken performance and driveability to a higher level. Maximum power is up by 12 per cent or 54bhp (40kW) to 471bhp (351kW) and the rev limit has been increased from 6,800 to 7,300rpm.
The influence of the V10 deployed in the LFA is evident in the instantaneous, palpable torque delivery as the driver increases pressure on the throttle pedal. The higher, 12.3:1 compression ratio boosts torque across the entire rev range, with maximum output rising to 530Nm, available from 4,800 – 5,600rpm.
Specific measures were taken in the engine’s design to raise engine rpm, including the use of titanium inlet and exhaust valves, new high-strength forged connecting rods and new main-bearing materials. And thanks to new components like the intake, throttle body, cylinder head, D-4S injection system, pistons, connecting rods, crankshaft and VVT-i valve timing, the powerplant is sure to set the heart racing. Maximum speed is electronically limited at 270 km/h (168mph), and a century sprint takes only 4.5 seconds. The raw performance data tells only part of the story, however. The RC F has been designed to deliver exception driver rewards in terms of grip, handling and involvement.
Lexus’ VVT-iE electric motor-driven VVT-i (intelligent variable valve timing) with a new intake camshaft is in place to increase valve lift. The VVT has been redesigned to extend the range of inlet camshaft timing adjustment for the Atkinson cycle: the inlet valves are held open longer than usual to allow a reverse flow of intake air into the intake manifold. This reduces pumping losses and increases the engine’s thermal efficiency, thus improving fuel efficiency and helping the engine meet Euro6 emissions standards.
Performance also benefits from higher pressure D-4S dual-injection, a wider throttle diameter and better breathing, thanks to new cylinder heads with improved porting and a high-flow, high-tumble ratio.
The RC F’s exhaust system features large-diameter front pipes, which minimize back pressure and ensure high power output. Making the merged areas of the pipes larger produces a clearer engine sound, while the design of the main silencer keeps noise down at low engine speed, with a dynamic increase at mid-to-high revs.
A performance speedster can’t do without the proper exhaust notes, and that’s when the ASC (Active Sound Control) System comes in. The ASC delivers enhanced exhaust, intake and mechanical sounds into the cabin. The system uses an ECU to monitor engine speed, throttle position and vehicle speed. It calculates the optimum sound for any given set of driving conditions and creates auxiliary sound to match through a speaker located beneath the instrument panel. Besides, the speaker is independent from the car’s audio system. The exhaust notes go from low, deep tone from 3,000 rpm and up to free-soaring, beyond 6,000 rpm.
The Lexus RC F is available for bookings in the domestic market at a price tag of RM RM 802,482.35, however the V8 version is indefinitely available for the European markets at a tad under 60,000 pounds for the time being.