"Smooth acceleration" means gradually increasing speed or velocity in a controlled and seamless manner, without any sudden or jerky movements. Full definition
This provides you with a great balance of smooth acceleration and sturdy turns for all kinds of terrain. (geekwrapped.com)
An aggressive first - gear ratio provides excellent launch performance, and evenly spaced gear ratios provide smooth acceleration through the gears. (topspeed.com)
This transmission delivers smooth acceleration and keeps the engine running in its sweet spot for fuel economy. (cnet.com)