So when you design your car, do you have to set its price and market it etc? Does it get compared to competitor's cars?
How does the game decide if your car is/will sell well or not?
The tycoon part of the game hasn't been made yet, but I assume you will be setting the price that you sell the car for.
In various forum threads and videos the devs have described how your cars will sell:
First, you need to know that a car has 5 main stats which are tameness, sportiness, comfort, safety and prestige. These are calculated by looking at a huge amount of stats for the car. If you want more detail about how the stats work and are calculated, have a look at these videos (but you dont need to watch them to understand what i will say next)
In depth stat analysis:
https://www.youtube.com/watch?v=XD7SgNn_Wt8
(Every statistic used in the calculations is explained in this video)
Four car stat examples:
https://www.youtube.com/watch?v=5MrtQwB1RWg
(there are two videos linked in the annotations of this one which have more in depth looks at the four cars in this video)
As for how the cars will sell, Automation has split the world map into countries (not every country has been included, some have been combined but there are still a very good number of countries. much better than the flash game pandemic II for example). Each of these countries will have preferences for how high they would like each of the five main stats to be, and they will also have preferences for a few other secondary stats, such as fuel economy, power, 0-60 time, etc. These preferences will be used to determine how well your car sells in each country that you sell to. I don't know how they are dealing with cars outside of the norm (for example, supercars are not the norm, but they still get sold) but I'm sure the devs have something figured out.
As well as the cars stats, there will be a reputation system for your company or for the platform of the car (I cant remember which, possibly both). I can't remember how they said that you would gain or lose reputation, but basically a good reputation will make people more likely to buy the car than they would have otherwise, and a bad reputation will make them less likely to buy your car even if it is good. Presumably if you have made a whole bunch of cars that explode in 500 yards you will get a bad reputation and no one will want to buy your cars, even if your next car turns out to be amazing.