MYLR is 700lbs heavier and a higher Cd than the M3.
Not to mention Dual Motor.
Expect less efficiency.
Not to mention Dual Motor.
Expect less efficiency.
The Model Y and Model 3 are really efficient EVs compared to the other EVs I've owned. I've been religious monitoring Wh/mile and mi/kWh after calibrating the results so that TeslaFi and in-car numbers match.
Model 3 RWD - 260 Wh/mile lifetime including shot inefficient trips with AC. Long highway trips are often 220-230 Wh/mile at 70F.
Model Y LR - 285 Wh/mile lifetime including shot inefficient trips with AC. Long highway trips are often 260-270 Wh/mile at 70F.
This is a perfect highway drive at 60mph (with a 1.5 mile local road connection to highway) on a Model 3 RWD to my office with minimal HVAC at 71.4F. It's 87.5% highway (10.5 miles highway, 1.5 local). The MYLR is about 30-40 Wh/mile worse.