Amazon Data Services, the data centre arm of Amazon Web Services, has leased an additional four acres of land from engineering and construction major Larsen & Toubro in Mumbai's Powai suburb, people familiar with the development said. The lease, which runs for more than 17 years, is expected to entail a total rental outgo of over Rs 650 crore. The starting rent has been set at around Rs 69 lakh per acre per month and will increase by 3 percent annually.