The best replacement for tdi is hybrid.

The best alternatives to tdi are rated as following:
★★★★★  hybrid
★★★★  gti
★★  prius
★★  tfsi
★★  tsi
★★  tdci
★  1.8t
★  mdi
★  jetta tdi
★  td5
★  sdi
★  gli
★  crdi
★  hdi
★  vr6
★  bluetec
★  fsi
  cdi
  padi
  passat tdi
  iantd
  gtd
  td5 defender
  tdi pro
  gti golf
  delta society
  camry hybrid
  wfp
  idi
  toyota prius
  gas jetta
  2.0t
  vw touareg tdi
  tfsi audi
  audi a4 tdi
  golf tdi

Your alternative for tdi is not listed? Suggest!
Speaking about tdi, one probably shouldn't forget about biodiesel.

Other search terms related to tdi and their ratings are:
★★★★★ biodiesel
★ air in fuel line
You have in mind a companion for tdi and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of tdi in all years. Click on graph for more.
tdi
hybrid
gti