There are two ways of implementing AWD in a front-engined vehicle:
1. Have a transfer case which takes input from the gearbox and has an output for each differential. This is what Landrovers use.
2. Build the front differential into the gearbox, connected to the output shaft. This is what Nissan's ATTESA drivetrain has used since 2000.
From what brian_ says, XC90 uses option 2.
For AWD in an gearboxless EV, you'll need a transfer case (or center differential, since front wheels travel further round corners than rear wheels), or one motor per differential.
I don't know of any EVs which have used the option 2 front differential without the rest of the gearbox.
1. Have a transfer case which takes input from the gearbox and has an output for each differential. This is what Landrovers use.
2. Build the front differential into the gearbox, connected to the output shaft. This is what Nissan's ATTESA drivetrain has used since 2000.
From what brian_ says, XC90 uses option 2.
For AWD in an gearboxless EV, you'll need a transfer case (or center differential, since front wheels travel further round corners than rear wheels), or one motor per differential.
I don't know of any EVs which have used the option 2 front differential without the rest of the gearbox.
