If you open the bonnet on a Reliant Robin you don't actually see much of the engine as that is half inside the car and can be accessed from inside the car - which is great when it rains.
On this photo you can also see my Robin's original colour - pink! Through the bonnet you have just enough room to check oil and water levels and top up the battery. (The second bottle in this picture at the front of the engine bay was for the water pistol.) The horn has been disconnected but leads to several air horns behind the front grill.
You can also see the heater which works by passing water
from the engine through an aluminium grille then blowing the warm air off this inside the car. The car was never cold though as you had the heat from the engine inside. Before I went to Staffordshire University I stayed at Fircroft college for a year as this was a residential college. As I would drive out of the college grounds via a single narrow lane, this one particular lady; Sylvia,
would see me and stand in the middle of the drive. She would hold her arms out and just stand there so I could not get pass.