Roizska: 4AGE TWINCAM 20 VALVE

4A-GE (20-valve)

Fourth Generation "Silver Top"Edit

The fourth-generation 4A-GE engine was produced from 1991 to 1995. It has silver cam covers with chrome lettering, hence the nickname "silver top". This engine yet again features a completely new cylinder head which uses five valves per cylinder instead of four. It uses Toyota's Variable Valve Timing (VVT) system on the intake cam, an increased compression ratio (10.5:1), and the intake system was replaced with a short manifold with individual throttles and velocity stacks, however the vane-type airflow meter was retained, requiring the use of a plenum. The previous 16-valve head used a sharply curved intake port, while the 20-valve engine used a very upright straight port. This engine produces 114 kW (153 hp; 155 PS) at 7,400 rpm with 16.5 kg⋅m (162 N⋅m; 119 lbf⋅ft) of torque at 5,200 rpm.

Applications:

AE101 Corolla Levin coupe 1991–1995 (Japan only)
AE101 Sprinter Trueno coupe 1991–1995 (Japan only)
AE101 Corolla Ceres hardtop 1992–1995 (Japan only)
AE101 Sprinter Marino hardtop 1992–1995 (Japan only)
AT210 Carina 1996–2001 (Japan only)
AE101 Corolla 1991–2000 (Japan only)
AE101 Sprinter 1991–2000 (Japan only)

Fifth Generation "Black Top"Edit

The fifth-generation 4A-GE engine produced from 1995 to 2000 is the final version of the 4A-GE engine and has black cam covers. It uses Toyota Variable Valve Timing (VVT) system on the intake cam. This engine is commonly known as the "black top" due to the color of the valve cover, and yet again features an even higher compression ratio (11:1). The air flow sensor was replaced by a MAP sensor, the diameter of the four individual throttle bodies was increased from 43 to 45 mm (1.69 to 1.77 in), the exhaust port diameter was increased, the intake cam lift was increased from 7.9 to 8.2 mm (0.31 to 0.32 in), and the intake ports were significantly improved in shape and contour, with the width of the opening at the head increased as well. Additionally, the black top had a lighter flywheel, a larger plenum, lighter connecting rods and revised rubber velocity stacks, and was also offered in 1997 with a six-speed C160 transaxle. This revision increased the power to 121 kW (163 hp; 165 PS) at 7,800 rpm with 16.5 kg⋅m (162 N⋅m; 119 lbf⋅ft) of torque at 5,600 rpm. The 'Blacktop' has become a favorite among enthusiasts and is used as an easy power upgrade for the early Toyota Corolla models, especially for use in the drift scene. Due to the relatively high state of tuning of the stock engine, most power/torque gains come from higher lift cams and engine management.

Toyota's 20-valve power figures are widely believed to be inflated.^{[citation needed]}