a. Cost: ~6L- b. Fuel- Diesel: Indigo TDi, Logan DCi and Swift DDiS
c. Driveability: Swift DDiS> Logan dCi> Indigo.
d. Good turning radius- Swift DDiS (4.7m)< Indigo (5m)<Logan (5.25m)
e. Good handling- Swift DDiS> LogandCi> Indigo.
f. Mileage: All the cars are frugal and as you have said Swift DDiS is well within your expectations.
g. Robustness: Logan dCi> Indigo> Swift DDiS. (swift prone to rattles)
h. Comfort: Logan dCi> Indigo> Swift DDiS (Space wise)
i. Breakdown assistance: Swift DDiS> Indigo> Logan dCi (Nothing compares to Maruti in this have. Have wonderful personal experiences)
j. Speeds: Swift> Indigo> Logan
k. Lastly, resale isn't really on my mind - Dont think these cars will make you wait for parts. But Mahindra- renault is yet to prove themselves on that front.
How often (in bumper to bumper traffic) does the turbocharger actually come in with all that torque?
Once you get used to the car- very often! 