I think it would fit great from the semantic. Message based communication is exactly what a lot of automotive systems are about (CAN, FlexRay, ...). The downside of the actor model from an implementation point of view is that you need potentially unbounded memory for the incoming message queue of each actor. For each message that is sent to an actor you need to allocate a message, populate it and place in that that actors queue. If the actor can't process fast enough the queue will fill hap.

It might work out with a very careful system design, but determining statically how much queued messages and memory is needed seems like a very hard task.