Glossary of Terms:
The VVT-I (Variable Valve Timing – Intelligent) technology achieves optimal timing by controlling the opening and closing of intake valve. The VVT-I computes RPM, throttle opening and other factors to constantly optimising timings. The other manufacturer only changes the timing at the extremely high or low RPMs. Toyota's VVT-i engine controls is incredible responsive, making changes in 1/1000th of a second. This results in engine that is powerful, efficient and clean.
"The other manufacturer only changes the timing at the extremely high or low RPMs."
Why and for whom "manufacturer" they have written this sentence.