Rather than the car or its characteristics be used to determine what one may consider a toy, I would argue its more a reflection of to what use the vehicle is put and the frequency of use may better determine whether it is a toy or not.
For example I had a Morgan 4/4 as my one and only and everyday transport for nearly 3 years, using it for both business and private miles, from the weekly shopping to continental holidays, it had its limitations which became more apparent with everyday use, it certainly wasn't IMHO a toy, . Whereas my Morgan Roadster is basically used for high days and rarely pressed into everyday type of service and used eg for the weekly shopping and I would consider it to be an indulgence / toy.
