Object was only described as oval due to shape of all the lights. it came into view over my left shoulder and then slowed to our speed, probably a couple of hundred feet out to sea and below us as we were on top of the west cliff. told bruce to speed up and object kept pace. road is only a few hundred meters long at that point so we slowed hard and i got out and watched object continue on along the coast at high speed towards dungeness. there was absolutely no sound from the object. the lees at that time is always absolutely silent, even talking too loud can be heard from one end to the other, so any engined vehicle can be heard for miles, especially one accelerating that fast.