In my recent experience delivery dates are no more than finger in the air guesses..
In July 2017 bought a new Range Rover Autobiography, a lovely car. Bought off the showroom floor so no wait. But after 9 trips back to the dealer for various fixes which still were unresolved, in October I rejected the car and ordered a new 2018 version. Delivery was estimated as week 2 January 2018.
This slipped to February, then in March I was told they now have a provisional build date of May! But the dealer anticipated this would slip again. At that point I cancelled the order and bought a Velar that the dealer had on call down, saving a shed load of money too.
Then more recently (March 19) I decided that the Velar wasn’t really the car for me, it never went wrong as such but I never entirely trusted it so decided to trade for something entirely practical (now having the Morgan and Swmbo 124 Fiat (mx5) for fun).
Fixed on a Skoda Superb estate, did the deal 7 March, car on call down so will definitely be with you this month. So today it’s 2 April and I’m in the dealers courtesy car (Kodiaq) and delivery “should be” this week.
Drives you mad..
Best experience I’ve had was with Morgan, where in fact the car was ready 2 weeks earlier than expected so had to sit at dealers as cash wasn’t available until January 2019..