Aug. 26, 1986

TOYOTA INTRODUCES IMPROVED TOYOTA MR2

New 1.6-liter Twin-cam Engine with Supercharger and
T-bar Roof Models Newly Available

 

MR2 1600G―LIMITED SUPERCHARGER T-BAR ROOF MODEL

MR2 1600G―LIMITED SUPERCHARGER T-BAR ROOF MODEL

TOYOTA 4A TWIN-CAM 16-VALVE ENGINE WITH SUPERCHARGER

TOYOTA 4A TWIN-CAM 16-VALVE ENGINE WITH SUPERCHARGER

Toyota City―TOYOTA MOTOR CORPORATION today announced improved Toyota MR2. The improved models will go on sale nationwide from August 26.

The latest improvements include mounting the newly developed 4A twin-cam engine with supercharger (4A-GZE: 1,587cc) and the reinforced chassis, resulting in superior engine performance and better handling and stability. Besides the improvements of the interior and exterior, T-bar roof models with a more open feeling and sporty look are newly available, giving the MR2 lineup greater variety.

  1. Newly Developed 1.6-Liter Twin-cam Engine with Supercharger
    The 4A-GZE, which is based on the 1,587cc twin-cam 16-valve engine (4A-GELU), has a supercharger* with air-to-air intercooler that cools the compressed air to improve intake efficiency. The result is a high-performance engine producing higher torque at all engine speeds, and offering superior starts and acceleration.
  2. Reinforcements to Chassis
    The suspension has been greatly improved and strengthened to complement mounting a higher performance engine. in the rear suspension, larger-diameter shock absorbers have been adopted and the suspension arms repositioned to provide superior handling, stability and riding comfort. Performance rods have been fitted between the two front suspension units of the supercharged and T-bar roof models. This provides greater rigidity to the body as well as improving the steering response, such as when cornering.
    Larger brake disks and brake boosters are used for the 1.6-liter 16-valve twin-cam engine models with and without supercharger. Tandem brake boosters have been adopted for the supercharged models to allow powerful braking with a light pedal effort.
  3. T-Bar Roof Models
    The T-bar roof has detachable glass panels (with sunshade panels) on both sides, and when these are removed the barshaped section remains along the middle. This roof has been introduced for the 1.6-liter 16-valve twin-cam engine models.
    The T-bar roof creates an open interior space, and even when the roof panels are fitted, sunlight can be enjoyed by removing the sunshade panels. The glass roof panels are removed by simply pulling the levers, and can be secured together with the sunshade panels in a soft case on the partition trim at the back of the seats.
  4. Changes to the Exterior
    A larger front bumper and front spoilers, together with newly designed combination tail lamps, give a sporty and clear-cut exterior exactly suited to a midship car. The supercharged models have an added new rear look with an FRP (fiber-reinforced plastic) louvered engine cover to radiate heat from the engine and inter-cooler.
  5. More Luxurious Interior
    Use of new seat material and the new door lining gives greater substance to the interior. Also, the small-diameter steering wheel and push-button heater control panel increase ease of operation.

*Supercharger Drive System

A supercharger is a device that uses engine power to mechanically pressurize and drive the air to the cylinders in order to increase supply of air/fuel mixture and achieve higher output.

The supercharger SC12 (manufactured by Toyota) is driven directly by the crankshaft via a belt. This method'allows a large volume of air/fuel mixture to enter the cylinders as soon as the accelerator pedal is pressed; consequently higher torque can be achieved even at lower engine speeds.

The Roots pump method has been adopted for the SC12 supercharger. This uses two rotors that resemble cocoons in cross-section in order to pressurize and drive the air. Also, a computer-controlled electromagnetic clutch is used in the drive train. This engages the supercharger when accelerating or under heavy loads, and disengages it when the load is light, thus simultaneously attaining low noise levels and fuel economy.

This is the second time that a supercharger has been adopted in a Toyota passenger car. The first use was last September when the SC14 type was installed in the Crown.

Main Specifications

Downloads (Images)

  • MR2 1600G―LIMITED SUPERCHARGER T-BAR ROOF MODEL
    MR2 1600G―LIMITED SUPERCHARGER T-BAR ROOF MODEL
  • TOYOTA 4A TWIN-CAM 16-VALVE ENGINE WITH SUPERCHARGER
    TOYOTA 4A TWIN-CAM 16-VALVE ENGINE WITH SUPERCHARGER