What limitations does the Arduino have depending on the stuffing?

Question

Arduino

Good afternoon. Alas, during the course of circuit engineering and electrical engineering at the university, I did not suffer from special enthusiasm, now I suffer from a lack of knowledge. There was an idea to make an on-board computer or even a microprocessor-based ignition system on my "car" on an arduino. In this connection, I rummaged and found a semi-dead project in the fake of which it was written:
"Standard arduino models are not suitable for multi-cylinder engines due to their lack of 16-bit timers. The shield board has been designed around the Mega"
1) that it means? That a regular board will not pull the collection of information from 4-5 sensors, counting and sending pulses? Explain, please.
2) how to find out how many timers are supported in the processor?
3) Does the delay and error increase depending on the number of sensors?
Thanks in advance!

Answer 1

There is already a free "on-board computer" system on STM32. You don’t need to shove an arduino into this business, because. a car is too dangerous a thing to use any kind of toy there.