What is the top speed of the Lexus IS 500 F Sport Performance Premium?
The top speed is electronically limited to 168 mph (270 km/h).
The Lexus IS 500 F Sport Performance Premium represents the high-performance version of Lexus’s IS sedan lineup. Powered by a 5.0-liter V8, it delivers strong straight-line speed, but like other performance-focused cars, its top speed is governed by an electronic limiter. The figure is consistent across the IS 500 range, including the Premium variant, and real-world speed can vary with tires, weather, and road conditions.
Official top speed figure
The manufacturer’s specification places the IS 500 F Sport Performance Premium at a top speed of 168 mph (270 km/h) when the limiter is engaged. This limiter is a standard feature designed to protect drivetrain components and ensure predictable performance on highways and tracks alike. While the top speed is the same across the IS 500 family, there can be minor variations based on wheel/tire combinations and ambient conditions.
What powers the speed and how the package influences performance
Engine, drivetrain, and balance
The IS 500 F Sport Performance Premium is equipped with a 5.0-liter naturally aspirated V8 that produces around 472 horsepower and 395 lb-ft of torque. It uses an eight-speed automatic transmission and is primarily configured for rear-wheel drive, with the F Sport Performance package tuning suspension, brakes, and aero for enhanced handling and braking stability. The top speed figure, however, is not increased by these handling-focused upgrades.
Does the Premium package change the limiter?
No. The Premium (and F Sport Performance) upgrades improve grip, brake bite, and stability, but they do not raise the factory electronic speed limiter beyond the standard 168 mph (270 km/h) cap.
Real-world considerations
In everyday driving, achieving the stated top speed is unlikely and often illegal on public roads. The official figure is obtained under controlled laboratory-like testing with specific tires and conditions. Real-world top speed can be affected by tire choice, aerodynamics, load, altitude, temperature, and road surface.
Summary
The Lexus IS 500 F Sport Performance Premium is electronically limited to 168 mph (270 km/h). While the Performance Premium package sharpens handling and braking, it does not increase the top speed beyond the factory limiter. The figure reflects the car’s high-performance intent, balanced against safety and reliability considerations for street use.
