under 5 liter V10
(from Lexus Press
Release) January 13, 2008 - Detroit, MI - The engineers
and designers at Lexus continue to use their groundbreaking LF-A
premium sports car concept as a medium for expressing their ideas
about what a high-performance sporting vehicle not only can be, but
should be. In this latest expression of the LF-A, they have removed
the car's top to create a high-performance roadster.
The LF-A Roadster is based on the sturdy yet lightweight
carbon-fiber and aluminum body used for the LF-A coupe, which helps
maintain the structure's strength and rigidity even without a top.
Like its coupe counterpart, the LF-A Roadster is powered by a
high-revving V10 engine that approaches 5.0 liters in displacement.
The V10, capable of more than 500 horsepower and test-track speeds
greater than 200 mph, is mounted in front of the passenger
compartment but behind the front-axle centerline in what the LF-A's
engineers refer to as a "front-mid" configuration.
The engine is connected via a torque tube and propeller shaft to a
transaxle that is controlled by paddle shifters. The torque tube is
a structural member that adds rigidity to the drivetrain and chassis
while also reducing vibration.
Styling is rooted in the Lexus L-Finesse design philosophy,
conferring the LF-A Roadster's front end with a compact,
low-profile, aerodynamic shape. Like its coupe counterpart, the LF-A
Roadster stands just 48 inches tall, but the Roadster configuration
adds a speed adaptive rear wing.
The rear is marked by a pair of wrap-around, arrowhead-shaped
taillights that bracket a pair of large grilles. These grilles vent
the heated air from the car's two rear-mounted radiators into the
LF-A Roadster's aerodynamic wake. The radiators are fed cool air by
two large intake ducts mounted just above the rear wheel wells. This
aft radiator positioning not only allowed the designers to keep the
car's front profile low and tight but also aided the LF-A's chassis
engineers in their search for optimal weight distribution.
Helping to provide balance and scale to the design, which features
an overall length of 175.6 inches and a wheelbase of 102.6 inches,
are high-performance tires on turbine-styled alloy wheels. The front
tires are 265/35R20s, while the rears are 305/30R20s. Like the LF-A
coupe, the brakes consist of 14.2-inch cross-drilled, vented discs
up front, and 13.6-inch cross-drilled, vented discs at the rear. The
front brake calipers are six-piston units and the rear calipers use
four pistons each.
An "F" logo, located on each front fender of the Roadster, indicates
the vehicle's status as a part of the new "F" marque. The name is
derived from the original "F" designation for the first Lexus LS
prototype. That vehicle was internally coded "Circle-F," with the
"F" standing for "flagship." The Circle-F designation further
evolved into the code name Flagship One, or F1, and the first F1
concept developed into Lexus' first vehicle, the LS. Since then, the
"F" code has come to signify a special vehicle program within Lexus
that falls outside the normal engineering and development process.
In addition, Fuji Speedway is the IS F's home circuit, and the shape
of the F-logo was inspired by many of the track's turns. The all-new
Lexus IS F sport sedan is the first production vehicle to carry the
Lexus LF-A Roadster Concept
Body Type: Two seat
Type: Front-mid-engine, rear-mid-transaxle
Engine: V10 (under 5.0-liters)
Transmission: SMT (sequential manual transmission)
Horsepower: More than 500
Top Speed: More than 200 mph
Overall Length: 175.6
Overall Width: 74.6
Overall Height: 48.0