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Subjective evaluation tests of “Acceleration Performance Feeling” with a driving simulator have been carried out on a rotary engine sports car. Additionally, although the test condition is limited, a test on an in-line four-cylinder engine sedan has been carried out. Influencing factors were analyzed through the experimental design and the influences of acceleration, gas pedal controllability, engine sound and their interactions were quantified. As the result, it has been found that the interactions must be considered in addition to main effect of each factor to improve users' evaluation especially on a rotary engine sports car. Furthermore, it is concluded that influencing factors are different between a rotary engine sports car and an in-line four-cylinder engine sedan.