The original tire size on my '86 Spider is 185/70R14 with a diameter of 24.2 inches. The Toyos have a diameter of 22.4 inches. I would think that 1.8 inches smaller would look worse (although the tires are lighter). It also lowers the gearing of the car.I just mounted a set of Toyo Proxes T1R's. the size is 195/55/14.
I have been looking at purchasing either Falken Ziex ZE-912 195/65R14 with a diameter of 24.1 inches or Yokohama AVS ES100 205/60R14 with a diameter of 23.7 so that my gearing and speedometer stay close to stock.