How much land each one uses.
Land is what an MLCP exists to save, so compare them on ground area per car, at the same height. A 20-car rotary tower is 11 levels tall, so here every MLCP is 11 levels too.
| Parking type | Space per car | Ground per car at 11 levels |
|---|
| Open surface parking | 23 m² | 23 m² (one level) |
|---|
| MLCP with ramps | 30 m² per level | 2.7 m² |
|---|
| Rotary tower, 20 cars | 20 cars on 6.55 × 5.5 m | 2.6 m² with its drive · 1.8 m² tower only |
|---|
| Automated MLCP with lifts | 16 m² per level | 1.5 m² |
|---|
Level for level, a rotary tower uses about the same ground per car as a ramp MLCP, and a fully automated lift building uses less. The difference is what you have to build: a tower needs no building, goes up in 3 to 5 days, and fits on a plot too small for ramps.
Space per car for surface parking and MLCPs: Master Plan for Delhi 2021, Table 17.3, Space Standards for Car Parking, which includes each type’s own aisles, ramps or lifts. It is Delhi’s standard, used here as a reference; other cities follow their own bye-laws and the National Building Code. Ground per car divides it by the number of levels and leaves out setbacks. Rotary footprints are the manufacturer’s published dimensions; “with its drive” adds half of a 6 m drive shared by two facing rows of towers.