A change in Connecticut’s vehicle tax law is giving the biggest breaks to owners of rare and exotic cars. Under the law, taxes are now based on original retail prices with fixed depreciation—not market value. That means big savings for top-end vehicles. For instance, a Porsche 918 Spyder once assessed at $1.47 million is now valued at just $266,000 for tax purposes—cutting the tax bill by about $14,000. It has resulted in some areas seeing a huge drop in their taxable vehicle list, and now lawmakers admit the shift unintentionally favors collectors and may need tweaking.