Townsend, who starred in England's final two FIFA World Cup qualifiers, continued his rich vein of form, scoring the first after 31 minutes when his expert delivery found its way past Brad Guzan.
Soldado then made sure of the three points nine minutes after the hour mark to send Tottenham fifth in the Premier League.
While Townsend will again hit the headlines for his goalscoring exploits, the game will also be remembered for all the wrong reasons after a linesman was hit by a smoke bomb thrown from the crowd following Townsend's opener, an incident that could result in an FA investigation.
Villa's only change from the 0-0 draw with Hull City last Saturday saw Nathan Baker replace Ciaran Clark in defence, while top goalscorer Christian Benteke started on the bench after overcoming a hip injury sustained in September.
Weimann came close to equalising when he curled a Westwood lay-off just past Lloris' left-hand post five minutes before the break, although it was Townsend who had the last chance of the half.
The in-form winger's fierce drive forced a strong right-handed save from Guzan moments before the half-time whistle.
It almost paid dividends when the Belgium international headed Leandro Bacuna's cross marginally over the bar three minutes later.
However, Tottenham doubled their lead courtesy of Soldado's third Premier League goal for the club.
The Spaniard took a Paulinho throughball perfectly in his stride before calmly dinking it over Guzan to make it 2-0 after 69 minutes.
Townsend continued to threaten without further reward as Tottenham extended their unbeaten run against Aston Villa to 11 matches in all competitions.
