1959 Cadillac Miller-Meteor

Photo from Wikimedia Commons
Ecto-1
The Ghostbusters' converted 1959 Cadillac ambulance/Pop Culture
The Ecto-1 is the iconic vehicle from the 1984 film Ghostbusters, a modified 1959 Cadillac Miller-Meteor ambulance/hearse combination. The car is 6.07 m long and weighs approximately 2,400 kg before the addition of all the ghost-catching equipment mounted on its roof rack. With its distinctive siren and flashing lights, the Ecto-1 was purchased by Ray Stantz for $4,800 because it needed 'some suspension work, shocks, brakes, brake pads, lining, steering box, transmission, rear end... also new rings, mufflers, a little wiring.'
Measurements
Cadillac professional chassis
Before roof equipment
Before ghost-catching gear
Commercial chassis wheelbase
With proton equipment on roof