In reply to the visitors first innings total of 198 in a game interrupted by rain during the first two days, Bengal scored 282 in 90.3 overs with Pankaj's 66-ball-52 laced with three fours and equal number of maximums being the most significant contribution on the final day.
Coming in to bat at 172 for five after India international Wriddhiman Saha's (8) dismissal, 27-year-old Pankaj saw his skipper Tiwary depart for 83 with scorecard reading 190 for six and nine runs still required for the lead.
In their second essay, Rajasthan were reduced to 15 for 3 in 6.2 overs with Ashok Dinda's two and Veer Pratap's one wicket bursts but skipper Ashok Menaria played sensibly and remained unbeaten on 69 (174 balls; 12x4) to see through the final day and secure a point.
Bengal's main spinner Pragyan Ojha, who claimed an impressive 4/49 in the first innings, returned wicketless from 14 overs on the Eden strip that looked eased out.
In absence of all-rounder Laxmi Ratan Shukla who is down with a knee injury, Bengal missed a fifth bowler sorely to play the role of partnership-breaker.
Gani claimed another in the fag end of the day but that was too little too late as the two days' of rain had already come to the rescue of Team Rajasthan who were handed an innings defeat in Assam.
Both Bengal and Team Rajasthan now have four points but the former have played one match less in group A.
Bengal will now take on a Delhi side which is on a roll after two back to back wins.
Bengal 282 in 90.3 overs (Manoj Tiwary 83, Abhimanyu Easwaran 53, Pankaj Shaw 52; Ajay Singh 3/72, Aniket Choudhary 2/32, Deepak Chahar 2/52). Match drawn. Bengal 3 points, Rajasthan 1.