Production of Toyota and Honda vehicles has been down the past few months and the monthly sales figures are reflecting this decreased output. In July 2011, Toyota only sold 7,907 Prius models. This represents a 41.8 percent reduction in sales when compared to the 14,102 units sold in July 2010. While it is a considerable decline from last year’s numbers, the month-to-month sales volumes increased significantly. In June 2010, only 4,340 Toyota Priuses were sold.

Sales of Honda hybrid models were also down last month. Only 311 Honda Civic Hybrids were sold, a decrease of 47.7 percent from last year. Honda Insight Hybrid sales were down by 44.8 percent to 987 units this year. As these two automakers begin to ramp up production in the coming months, sales will likely bounce back quickly.

In other fuel-efficient motoring news, the battle between the Nissan Leaf and Chevy Volt continues. Last month, sales of the Nissan Leaf skyrocketed and dwarfed sales of the Volt. The trend continued in July with Chevy Volt sales totaling 125 units, down from 561 in June.

Nissan Leaf sales were also down from June when Nissan sold 1,708 units. In July, this figure dropped to 931. Year-to-date sales of the Nissan Leaf sit at 4,806 compared to 2,870 for the Chevy Volt.

While the Chevy Volt may be quieted for the time being, do not count the vehicle out just yet. The drop in sales is not surprising as General Motors stopped production of the vehicle for several weeks in June in order to revamp the Detroit-Hamtramck Assembly plant.

The planned upgrades will allow General Motors to increase production and deliver Chevy Volts to dealerships across the nation by the end of the year. The initial stage of the Chevy Volt launch was restricted to certain communities. Once national sales open up, the Nissan Leaf vs. Chevy Volt sales battle will certainly get exciting.