The best replacement for s40 is s60.

The best alternatives to s40 are rated as following:
★★★★★  s60
★★★  audi a4
★★  s80
★★  c30
★★  passat
★★  9-3
★  s60 volvo
★  saab 9-3
★  s20
★  s60 which is better
★  honda rebel
★  acura tsx
★  s60 nokia
★  v50
★  s60 symbian
★  v40
★  volvo s60
★  vulcan 500
  kawasaki vulcan 500
  bmw 325
  s60. volvo
  toyota avensis

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Google Trends

Scale is based on the average worldwide traffic of s40 in all years. Click on graph for more.
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